RECORDS

OF

THE

SOUTH AUSTRALIAN MUSEUM

VOLUME 21 PART1. MAY 1987

CONTENTS:

EDMONDS, §. J. Obituary of I. M. Thomas

EDMONDS, 8. J. Echiurans from Australia (Echiura)

HERCUS, L. A. Looking for Ditji-mingka

JAGO, J. B. & PLEDGE, N. S. Obituary of B. Daily

KERZHNER, I. M. Nabidae (Heteroptera) of Vanuatu

LEE, D. C.

Introductory study of advanced oribate mites (Acarida: Cryptostigmata: Planofissurae) and a redescription of the only valid species of Constrictobates (Oripodoidea)

PATTERSON, C. & RICH, P. V.

The fossil history of the emus, Dromaius (Aves: Dromaiinae)

RILEY, J. & SPRATT, D. M. Further observations on pentastomids (Arthropoda) parasitic in Australian reptiles and mammals

SUTTON, P. From horizontal to perpendicular: two recent books on central Australian Aboriginal painting

TINDALE, N. B. Kariara views on some rock engravings at Port Hedland, Western Australia

TRIGGER, D. S.

Inland, coast and islands; traditional Aboriginal society and material culture in a region of the southern Gulf of Carpentaria

WATTS, C. H. S. Revision of Australian Berosus Leach (Coleoptera: Hydrophilidae)

ZEIDLER, W.

The scaled-squid, Lepidoteuthis grimaldii Joubin, from southern Australian waters

Volume 21(1) was published on 22 July 1987. Volume 21(2) was published on 24 December 1987.

ISSN 0081-2676

PAGES

61-63

119-138

149-156

65-68

29-33

35-42

85-117

139-147

161-165

43-59

69-84

1-28

157-159

REVISION OF AUSTRALIAN BEROSUS LEACH (COLEOPTERA : HYDROPHILIDAE)

BY H. S. WATTS

Summary

The Australian members of the hydrophilid genus Berosus are revised and redescribed. A key to species is give. Thirty-two species are recognised of which 18 are described as new: B. amoenus, B. arcus, B. aquilo, B. dallasae, B. gibbae, B. josephenae, B. juxta discolor, B. reardoni, B. macropunctatus, B. sadieae, B. nicholasi, B. niger, B. quadrapunctatus, B. trishae, B. timmsi, B. veronicae, B. ralphi and B. vijae.

REVISION OF AUSTRALIAN BEROSUS LEACH (COLEOPTERA: HYDROPHILIDAE)

©. 1.5, WATTS

WATTS, ©. HS. 1987, Revision of Australian Berosus Leach (Coledptera: Hydrophilidae). Ree:

Se lua Mis. 211) 1-28.

The Australian members of (he hydrophilid genus Berosyvs are revised and redeseribed. A key [Oo splecies is 2iven. Thirly-fWe species are recognised of which 18 are descrihed as new: 2 umoonus, Burens, B aquily, B dallasae, B. gibhae, B. josephenae, Bo justadiscolar, B. reardoni, B wnecropuncratus, B sacieae B. nicholas) B niger, B. quadrupuncralns, B trishae, B tiniest,

B, vervnicae, B, ralphi and B. yijee,

The following synonymies are proposed: B /lindersi Blackburn B. sinnlans Blackburn B&. stigitatico/lis Fatrmaine: = B. auriveps B. approximans Pairmaire, Bo quartinus d'Orchmenr - B. queenslandicus Blackbur; B wrayis Blackburn

B ovipentis kainmaire Wlackburn = & blackhurnt Zain

B. discolor Blackburn:

B wustratige Mutsarit.

Co bLOS. Waus, Sourh Australian Museum, North Terrace, Adelaide. Soul Australia S000

Manuseripr received 24 July J98s.

The hydrophilid fauna of Ausiralia js relatively rich in species and numbers of individuals. They form uw conspicuous part of tle aquatic fauna. In general they are well-colleeted and well-represented in vollections, Despite this they have received litle recent taxonomic attention.

A major difficully in dealing with Berasus Leach, IS? in Australia was the inacequacies af existing keys which reflected a weak taxonomic base exens- plified by the facet that some [8 of the 32 known species were undesenbed, including the commonest southern species. At the same time some widespread species were deseribed under as many as five different names.

The last biajor atlemipt jo revise Australian Berosus was by Blackburn in 1898,

Some characters used in the key, such as leg colour and details of Lhe punctation, are nat totally reliable, but the male genitalia have provided good characters i all cases.

The genus Berasus is a member of |he subfamily Berosinae which is characterized by a markedly deflexed head, seven- or cighteseemented antennae and meso- and metasternae without a continuous common keel,

Berosus can be separated trom the other Australian genera in the subfamily (Regéinbartia, Gloharia and Amphiopsy by possessian af protruding eyes, seven-segmented antennae, and striae on elytra, although in some species these are partially masked by strong elytral punctations. Adults of all bur a few al the smaller species are yellow-brown in colour They are found mainly among vegetaiion at the boron and sides of ponds and pools. Adulbs are often taken at light sometimes some distance from water. The larvae are distinetive

witha series of lateral filamentous appendages ard live in pools in similar situations to the adules. | know of no detailed description of the larvae of any Australian species,

Berosus is a large cosmopolitan genus and many attempts have been made to subdivide it, none of which appear particularly satisfactory to me. In particular, the subgenus /¥ygrorrophus W. Macleay which includes only the species & (4.) nutans and B (H.) devisi, both Australian species, seems unwarranted and to be based on an undue emphiasts on the punetation of the upper surface.

Within Australian species there are five more or less distinctive groupins.

Group | species are small, have the midline of the mesosternum produced downwards in a distinet ridge, head black, metacoxal process weakly to moderately lobed laterally, last abdominal seement notched and the second elytra! stria 1/4-the length of the elytron (& discolor, B. approximans, B, reardoni, B. juxtadiscolor, B. limmsi).

Group 2 species are small, with the midline of Ihe mesosternum produced downwards in a distinct pillac, head black, metacoxal process strongly lobed laterally, the last abdominal segment notched, the second elytral stria about 1/2 the length of elytron, and with strongly developed medial ridge on first abdominal segment (& macropunctatus, 8 quadrapunctatus, 8. trishae),

Group 3 species are similar to Group 2 specics except for a less developed medial ridge on first abdominal! segment, strongly humpbacked which is associated with the presence of a space between elytral striae 7 and 8 and/or 8 and 9 in the middle of the elytron (A involutus. AL niger, & areus).

Group 4 species are similar to Ciroup 2 but are

te

larger and have the second clytral sta reaching about two-thirds the lenpih of the eélytran (B duplopunctatus and B. queenslandicus).

Group 5 species are generally larger with brown heads, midline of mesosiernum with a weak central keel, und metacoxal process withaul lateral lobes (BO nutans, B, pulchellus, B dallasi, 8B. macumbensis, B. imwittipennis, B. anoenus, 8, josephenae, & gibbae, B. majusculis, B. veronicae, B. aquila, B. australiae, B, decipiens, B sadieae, B nicholasi, B. vijae, B. subovatus, B. ralphi and B. debilipennis),

Groups 1-4 have similarities with cach other and roughly correspond to the subgenus Berosus Hope. Group 5 species correspond to the subgenera Lnoplurus Hope and AHyzrotrophus W. MacLeay. Since Berosus is a world-wide genus, Surther consideration of subgeneric groupings should in- clude extra-Australian species and is beyond the scope ol this revision.

The collections from whieh specimens were

examined are listed under the following abbreviations: AM Australian Museum, Sydney,

ANIC Australian National Inseet Collection, Canberra,

BM(NH) &ritish Museuni (Natural History). London,

OW Private collection of author.

NMV National Museutn of Vivtoria, Melbourne,

NSW DA New South Wales Department of Agriculture, Sydney.

NTM Northern Territory Museum, Darwin,

MNHN Museuni National d'Histoire Nalurelle, Paris.

SAM South Australian Museum, Adelaide,

WAM Wesiern Australian Museum, Perth. OP! Queensland Department of Primary Industry, Mareeba.

KEY TO AUSTRALIAN SPECIES OF BEROSUS

1, Midhine of mesosternum produced downwards in a distinct pillar (Fig. 10), Aor projecting backwards heryeen metavoxue. Mead black imetallic), Metacoxal process lobed laterally (rudimentary in &. discolor). Last abdominal segment notched, Small (< 7mm). --.. ..2

| Midhine of mesosternum with weak central keel, projecting weakly forward between mesoconac Head completely or partially brown except B pulchellus whieh lacks elytal stfiae and B amoenus whieh has a predominantly black Pronolum and elytra also. Melacaxal process irvangular (Pig. 1) 22... + + ay,

2,(1) Second elytral soja about 4 feneth ‘of elvinontd

2, Second elylral stra 1/2 length of ebyiron

©. WS. WATTS

3, 42) 3. 4. (3) 4, . (4) §, b. (2) 6, 7, (5) 7. B. 16) R. 9. (4) 9. 10. (9) 10, 1) (Ry i.

Rugose portion at metalentur <1/2 teneth of fomutr (Fig. 2), Mesosternul pillar flat.on ventral COG evens | tppceee & discolor Blackburn Rugose portion ol metalenmuy S12 lengil of fomtur. Mesosiernal pillar weakly concave of veritral edge rete:: | Riuizose portion of inesofernuir 12 2-2/3 length of fa) Ue ee er, awe | Rugose portion of mesofemur <1 /2 length ot femur . ot B approximans bairmane Rugose portion of (feta: and meso-lemora pale, same colour as rest of leg. B reardoni spnov. Rugose portions of meta- and meso-femora much darker |Man vest of leg 2.0, 2.2... 7 Second elyiral sija about 1/2 length of vlytiron, fugose portion of metafemur S1/2 length ot Femina ge sire ft iigaees. 9 cake, a) Second elytral seria aul least 2/3 lenerh af elytron, rigose poruion of metafemur <1 /2 lengih of PRAMS s SoS ae Oo =~ -e TF Punclures on sides af pronorum never in size, Interstvial pupclures small, subobsolete, hind lemurof male with triungilar bulge an hind edge we Banta’ sp.nev Panatiiver on 1 sittes of prenewum evenly sized with ouly a few smaller anes, inferstrial punctures moderately marked, hind femur of male normal ctr teers e ees B ytvtadiseoler sp.nov Space be} ween ely(ral striae 7 and 8 and/or 8 and 9 prealer in middle than at ends of elytron (Fig. 8), Medial ridge on firsr abdominal seyment 1/4 as deep as long, wilhoul backward projection on ventral edge Elytral striae 7, 8 and ¥ subparallel with each other, Medial ridge on fest abclontinal segment deep | 3-1/2 as deep-as long, wilh a backward projection on ventral edge -—,-.220,2--,,, 0 Elyrral siria 8 raised and cacinatein middle and towards apex. Distance between elyiral striae 8 and Y greatly enlarged i iniddle (Fig, 8), Interstrial punctures weak, subobsolete. Northern SEPRCIES Scare oicjciem O07 tan ae Dever aoe tll Elvtral stria 8 ot raised, ‘Interstria \ae 7 Ras Wide or wider than 8-9 (Fig, 9). Laterstrial punctures moderately strong, Southern species -- 46 B. invalutus Macleay Rowose por tion of metafemur approximately 1/2 length of femur. Panetures on dise of pranotum ol Ovo sizes, larger predominating. Posrerior partion of carinate eight) imtersta at right angles co edge of elytron. Black, except for interstria in apical 1/4 of elytron........... litt ty eeeet corer e B Riger spTDy, Ruwrense purhon of metafentur ‘tenehes 2/3 length of femur on rear edge, Punetures on diye ol! pronolum of abe size, posterior portion of catinate eighth imtersiria of approximately 45° to edge of elyiron (Fig. 8). Barcus sp.nov. Pronotum smooth, shiny, moderately covered With large puncitires often with spaces preater than 1/2 diameter of puncture or erealer between punctures. Pronoltum vellow with three longilidinal black Stripes... peace AD Head and proratiim rugase, densely. covered with large punctures, those an provotuny separated

15, (14)

18, 16, (15) 16,

Vy, (14)

7,

8. (17)

REVISION OF BEROSLIS

by narrow nilges, Promotumt Black except far extreme lateral margins

BR, IMACFOPUNCLALUS sp.Nov.

} Rugose portions of mesofemur a little under 1/2

length of femur. . 8, quadropunctalus sp.m0y, Ruwose portions af mesofemur Ly 2-2/3 lengthy CU MANOR ese pe oe B. trishae sp.nov. Ponctures On prononiny af Iwo distinct sizes. Areas between elytral striae with shallow punctures... .8 daplopunctatus Blackburn Punctures on pronotum vary little in size. Areas belween elytral striae virtually impunctale .., B. queensiandieus Blackburn Punctures on elytron densely und evenly distributed, each with a short seta, Punctures in clyERAl striae ditfieull to distinguish froin (hose WM WMICPRIe wee Rete ne 15 Punctures on elytra mostly without setae. Phnetures if clytral ilersttiac seatrered, distines from those in striae Punetures on pronatuint expanded faterally forming a-dense network of closely spaced short striae orientated across the pronotum (Fig, 5) ; BL niteans W, Macleay Punciures ¢ on n prongtum MOTMA eee eee 16 Small (< 3.0 nod), elytvon without striae Head metallic black... . B. pulehellus W. Macleay Larger | >3.6%m), elytra wilh deeply impressed striae, Rear of head with dark markings ———. ; B. dallasi sp.nov. Interstrial purnctu ures towards sides of elyira not as mimcrous as as those on disc, olfen arranged TB SIMRO TOW ie ee ee ee eee 18 lorerstrial purtetures towards sides-al elytra mare numerous and larger (han (hose on disc, never arranged in single lines... . ~B macumbensis Blackburn Outer anical spine on elytron tong and (hin (Fig. 3) Interstrial punetures laterally subobsolete, arranged in one row aver most of elyiron. Rugese portion of meiafemur approni- mately 1/3-2/3 length of femur Pale ----- a Re bean Bo munitipennis Blackburn Nor with above combination of characters (Xi8; SV veep aecorresurat etogeo rere teres LS

19. (18)

19, of pronotum of one size (eg. Fig. 6)... 20, (19) Head black. 20, Head pale brown, 21, (20) 2), 22. (19) Rugose portions of mesc 22. 23. (22) stiria >22. Rupose portion of abdominal segment notched .,. 23 VEFONIEE vor yyy ss t fast 24,

Punotures in jntersiria 3 of two sizes, with small size predominwing (Fig. 11), Punetures on dise of pronotum of two sizes mostly large with some smaller ones (ug. Fig. 7) 2.) 0-22.) 02... , 22 Punctures ininterstria 3 of one size, orwith only an occasionally smaller one. Punctures on dise 20 Interstrial punctures on elytron approximately the same size as those in striae Pi eb eee clavate mcm B. amoenus sp.nov. Inierstrial punetures on elytron smaller than (hose in striae... ,, 2) Rugose portions of femore dark-brown —.... 5 -B. Josephenue sp wov. Rupose Portion of femare pale-brown...,... . B. gibhde sp.nov Rugose portions of meso- and meta-lemore noticeably darker than rest of femursee Table |. Rugase portions of meso- and metafemore of same colour as rest of femur... oc... 23 larger (>3.9 mm). Number of punctures iw second ely(ral interstria lo level of end of second mesotemur approx. 1/3 length of lenitir. Male with apical iB. nemageulds Blackburn Sonaller (<6.5 mm). Number of punetures in second elyiral iniersiria back to level of end of sccond sifia usually <26. Rugase portion of inesofemur >1/2 length of femur except in B, NOC 24 Rugase portian of nievolerwur 2 1/2. Apical spines on elytra moderately developed (hig. 4) B veronicae sp.nov. Rugose purticrn of mesofemur >1/2 lengiti of

femur ate Table 2.

SYSTEMATICS

Berosus discolor Blackburn (Figs 2, 13, 18)

Berosus discolor Blackburn, !888(1889), p. 829 Berosus flindersi Blackburn, 1888(1889), p. 831, syn.

Noy,

TABLE L. Distinguishing characters for four species of Berasus,

B. aquila sp. nov.

B. australiae Mulsant

B sadiae sp. nov.

; ilo sp. . I s & decipiens Blackburn j . 5

3.3-5,0 mm long

Tips of elytron usually without spines.

Third segment of male prolars) approximately gare length a5 segment,

Elytral punctures weak, Strial punctures arranged in one line, over most of elviron.

Coastal Norihern Territory,

6.5-9.0 mm long

Tips of elytron with well developed spines.

Third segment of male protarsi shorter than second segment.

Elytral punctures usually strong, sirial punctures not artanged in one line inwards from. siria 7.

Australia-wide.

6,1-8.0 mm long

Tips of elytron with well- developed spines.

Third segment of male length of second segment.

Elytral pufierures usually weak, Strial punerures usually arranged in one line over most of elytron.

Wyndham to Cairns.

§-5.0 mm long

Tips of elytron usually with well-developed spines.

Third sewment of male length of second segment.

Elytral punetures sually weak, strial punctiires usualy arranged th one

line aver most of elytran.

Coastal Northern Territory.

©. HS, WATTS

TABLE 2. Distinguishing characters for five species oF Heresies,

B, debilipennis Blaekburn

4.0-6.0 mm long

Apex of elytron rounded or with weak spines. Punctures in Ist elytral interstria, scatiered, not arranged in a row.

Lateral punctation on elytran moderale to STON.

Tip of posiconul process Ii same plane as rest of underside,

10-18 punctures in second clyrral Strie.

First segment of male protarsi much

B. subovatus Knisch 3.0-3.0 iM lone Apex of elytron rounded of weakly truneated, Punctures in 1st elytral interstria, arranged ina Single row,

Lateral punctation on elytron weak.

Tip of posicoxal process in same pling as rest of underside.

6-7 punciures in second elyiral suria,

First segment of male protarsi

B. yiyae sp. nov.

3.0-4.5 mm long

Apex of elytron with weak spines,

Pufietures in Ist elytral interstria, arranged ina Single row,

Lateral punctation on elytron moderate to strong.

Tip of postvoxul process in same Plane as rest of underside.

8-13 punetures in second elytral stra,

First segment of male prolarsi equal

B. nicholasi

sp. nov. 5.0-6.5 mm long Apex of élytron with weak to moddenale spines. Punetures in tor elyinal interstria, sealtered, not arranged in a row.

Lateral puneciarion on elytron small and Weak.

Tip of postcasal provess i Same plunge as rest of woiderside,

LO<1R punchires in second elyiral stria.

First sepment of male protarsi equal

B, ralphi sp. noy.

3.5-4,.5 mm long Apex of elyiron truncated or with weak spines, Punetures in Ist elytral interseria, seattered, fol arranged ina single row, Lateral punclation on elytron small and weak,

Tip of posicoxal process bent downwaruds av 45) to rest of Underside.

Tel3 punctures in second ¢lytral Atria.

First segment of male provars)

longer than second.

longer than

second. second,

in lenpth to

longer than second.

in length to second.

55

Thpes

Berosus discolor: Holotype, male, Pr Lincoln, §.A., in BM(NH), seen.

Berosus_/lindersi; Holotype, male, Pt Lincoln, S.A., in BM(NH), seen. Paralype, female, in SAM, seen.

Descriplion (number examined 131) Length 2.8.8 mm. Oval, elytra moderately humped, highest behind middle where it is

approximately 1/3 » height alshoulder: Apex of”

ely(ron rounded, in some subavure and suggestive of a thick broad spine, Head relatively narrow, black, shiny, metallic, Pronotum black with sides broadly brown, often with small central brown spot or band behind front edge, shiny, metallic, Elytron shiny brown, with striae, punctures and a few spots black, Ventral surface black, appendages brown, except for extreme lips Of lapial palps and rugose porlion of meso- and metafemur which ean range from light-brown to black. Punctures small, dense. Punctures on head strong, regular, well-impressed, most less than 1/2 puncture width apart. Punctures on pronotum similar but slightly less dense. Elytral striae well-impressed. Second stria on elytron 1/4 length of elytron, Punctures in and between striae similar, about same size as on pronotum, strongest laterally, those on extreme humeral angles and belween first stria and suture smaller. Mesosternal keel weakly to moderately well-developed, pro-

jecting backwards. Metacoxal process sharply produced backwards in niidline, lateral lobes raised, sides diverging towards lront, small narrowly oval shiny depression in midline. Keelin midline of first abdominal segment weak, reaching only |/4 to 1/3 of width. Rugose portion of metafemur approxr mately 1/3 length of feriiur. Meso- and meta-libia strongly spined. Apical abdominal seament with small weak noteh.

Male: Protarsi foursegmented, first seament moderately expanded,

Remarks

Less. common in collections than B approximans. Readily separated from those other Berosus with a well-developed mesosternal keel and short second elyiral stria by the small area ol rugosity on the femora.

Distribution (Fig. 79) Coastal southern Australia from Perth, W.A. ta Sydney, N.SW., and Tas,

Berosus approximans Fairmaire (Pigs 10, 12, 17)

Berosus approximans Fairmaire, 1879, p. $2. Berosus ovipennis Fairmaire, 1879, p82, syn. nev,

wn

REVISION OF BEROSUS

She.

Testa

> BG) ost at %.5 $e lo 8 Gre Fe ess oy,

FIGURES I-11. 1, Midventral region of B. nicholasi; 2, midventral region of B. discolor, 3, apex of elytra of B. munitipennis; 4, ditto, B. munitipennis; 5, pronotum of B. nutans; 6, pronotum of B gibbae showing punctation on disc; 7, pronotum of B arcus showing punctation on disc; 8, lateral yiew of elytron of B. arcus; 9, lateral view of elytron of A involutus; 10, lateral view of B. upproximans showing pronotal pillar (shaded); 11, elytron ot

B. majusculus showing punctation of disc,

Cc. H. S. WATTS

|

KY

18

16

ART See al

ie)

17

ie

22 3

: SHE? Ee

27 28 29 30 31

FIGURES 12-31. 12, dorsal view of male genitalia of B. approximans; 13, ditto, B. discolor; 14, ditto, B. juxtadiscolor; 15, ditto, B. reardoni; 16, ditto, B. timmsi; 17, lateral view of male genitalia of B. approximans; 18, ditto,B. discolor: 19, ditto, B. juxtadiscolor; 20, ditto, B. reardoni; 21, ditto, B. timmsi; 22, dorsal view of aedeagus and right paramere of B. duplopunctatus;, 23, ditto, B. queenslandicus; 24, dorsal view of aedeagus of B. arcus; 25, ditto, B. niger; 26, ditto, B. involutans;, 27, lateral view of aedeagus of B. duplopunctatus; 28, ditto, B. queenslandicus; 29, ditto B. arcus; 30, ditto, B. niger; 31, ditto, B involutans.

25 26

REVISION OF BEROSUS 7

yea a

38 39 40

=

sega 0 ede

- ot

46

=

52

Gao \S sae Ca

49 5 51 53

FIGURES 32-53. 32, dorsal view of mate genitaha of B dallasi; 33, ditto, B. gibbae; 34, ditto, B. aquilo; 35, ditto, B. vijue; 36, ditto, B. subovatus; 37, B. trishae; 38, lateral view of male genitalia of B. dallasae; 39, ditto, B. gibbae; 40, ditto, B. aquilo; 41, ditto, B. vijae; 42, ditto, B. subovatus; 43, ditto, B trishae; 44, dorsal view of male genitalia of B. debilipennis (thin form); 45, ditto, B. debilipennis (thick form); 46, ditto, B sadieae; 47, ditto, B. decipiens; 48, ditto, B. pulchellus; 49, ventral view of male genitalia of B. debilipennis (thin form); 50, ditto, B. sadieae; 51, B. debilipennis (thick form); 52, ditto, B. decipiens; 53, ditto, B, pulchellus,

Q 0

C,H. S.

55 \ | 56 54 hy | | ) 60 61 Re

68 69

WATTS

58 57

59

ity

70

FIGURES 54-70. 54, dorsal view of male genitalia of B, majusculus; 55, ditto, B. josephenae; 56, ditto, B. amoenus: 57, ditto, B. nutans; 58, ditto, B. munitipennis; 59, ditto, B. macumbensis; 60, lateral view of male genitalia of B majusculus; 61, ditto, B. josephenae; 62, ditto, B. amoenus; 63, ditto, B. nutans; 64, ditto, B. munitipennis; 65, ditto, B, macumbensis; 66, dorsal view of male genitalia of B. nicholasi; 67, lateral view of male genitalia of B. veronicae;

68, dorsal, B. veronicae; 69, lateral, B. nicholasi; 70, lateral, B. macropunctatus.

72

FIGURES 71-74. 71, lateral view of male genitalia of B. australiae; 72, ditto, B. ralphi; 73, dorsal view of male genitalia

71

of B. ralphi; 74, ditto, B, australiae.

74

REVISION OF BEROSUS 9

Berosus stigmaticollis Fairmaire, 1879, p, 82, syn. nov.

Berosus simulans Blackburn, 1888(1889), p. 832, syn. nov,

Berosus auriceps Blackburn, 1889(1890), p. 447, syn. nov.

Berosus blackburni Zaitz, 1908 p. 358, nom. nov. for B. auriceps.

Types

B. approximans. Holotype, male, Peak Downs, N-T. in MNHN, seen.

B. stigmaticollis, Holotype, female, Peak Downs, N-T. in MNHN, seen.

B. ovipennis, Holotype, female, Pt Mackay, in MNHN, seen.

B. auriceps. Holotype, male, Northern Territory, in BM(NH), seen.

B. simulans. Holotype, male, Rivoli Bay, S.A, in SAM, seen,

Description (number examined 134)

Length 3,0-5.2 mm. Narrowly oval, elytra moderately humped, higher behind middle where it is 1/3 higher than at humeral angle. Apex of elytron rounded or produced into a small, widely triangular spine. Head black, shiny, metallic. Pronotum brown with broad central panel darker, dark portion usually not reaching front or rear edges and often with lighter area in midline, shiny. Elytron brown, with striae, punctures and a few spots, black, shiny. Ventral surface black, append- ages lighter. Rugose portions of femora variable from light to dark-brown. Punctures on head strong, regular, well-impressed, most less than 1/2 puncture width apart. Punctures on pronotum simi- larly sized but less dense. Weaker on disc. Elytral striae well-impressed. Second stria on elytron 1/4 length of elytron. Punctures in striae and between them approximately the same size, as strong laterally as on disc. Reticulation of elytron variable, virtually absent in some, in others very strong and almost masking punctures, especially laterally. Ventral surface densely rugose punctate. Mesosternal keel strongly produced downwards forming a pillar. Front edge almost perpendicular to body, ventral edge straight, or concave in some specimens, with the front portion projecting downwards as much or further than rear portion. Lateral lobes of metacoxa raised, bluntly pointed, midline produced backwards in a point, small oval depression in midline devoid of sculpture. Keel in midline of first abdominal segment well-marked, reaching 1/4-3/4 segment. Rugose portion of metafemur 1/2-2/3 length of femur. Meso- and meta-tibiae strongly spined. Apical abdominal segment weakly and widely notched.

Male: Protarsi four-segmented, first segment moderately expanded. Head narrower than in female,

Remarks

A southern species slightly larger than B. /lindersi. Readily separated from that species by the larger area of rugose sculpture on the femora. The notch on the last abdominal segment is also broader and weaker in B&B. approximans. Differs from B. juxtadiscolor and B. reardoni from northern Australia by having a smaller amount of rugose sculpture on the femora than in these species, in the generally strongly elytral punctures and in characters of the aedeagus. Its wide distribution, variability in size and in the strength of the dorsal punctation has led to it being described a number of times by earlier authors.

Distribution (Fig. 76) Southern coastal Australia from Kimberley, W.A., to Rockhampton, Qld.

Berosus reardoni sp. nov. (Figs 15, 20)

Description (number examined 7)

Length 3,2-4.5 mm. Narrowly oval, elytra moder- ately humpbacked, highest behind middle where it is 1.4 x height at shoulders. Apex of elytron bluntly pointed. Head shiny, black. Pronotum yellow-brown with two longitudinal black strips adjacent to midline, dark portions not reaching front or hind margin. Elytron yellow-brown with striae and many punctures on head strong, regular, well-impressed, most less than 1/2 a puncture-width apart. Punc- tures on pronotum moderately dense and strong laterally, weaker and sparser on disc. Dorsal surface weakly to moderately reticulate. Elytral striae well- impressed, less so on disc, second stria on elytron a little less than 1/4 length of elytron. Punctures in striae somewhat larger than those in interstriae, shallower and slightly larger laterally. Mesosternal pillar long, well-developed, ventral edge concave. Ventral surface densely rugose-punctate. Metacoxal process broad, lateral lobes lowered slightly, diverging towards rear, deeply and broadly pitted in centre, weakly triangularly produced backward in midline. Apical abdominal segment notched. Rugose portion of metafemur 2/3 length of femur, that of mesofemur between 1/2-2/3, that of profemur about 1/3 length of femur on hind edge.

Male: Protarsi four segmented. First segment moderately expanded.

Remarks

This northern member of the approximans species group closely resembles B, juxtadiscolor, but differs in being lighter in colour, particularly the rugose portions of the femora, and in the shape of the aedeagus and parameres.

Distribution (Fig, 75) Northern N.T.

My tC HOS WATTS

pes Halatype male ‘Katherine, NT, at light 9.11.68 -L oA. L. Warson’, in ANIC.

Berosus jovtrdiscolar sp. noy. (Pigs I4, 19)

Description (umber exited 18)

Length 3,5-5,0 mm. Narrowly oval. Elytra weakly humpbacked, bighesr behind middle where itis 1.2 » fleizht at shoulder, Apex of elytron rounded Head shiny black. Pronotuin dark yellow-brown will two central longitudinal stripes darker. Elyiron darkish yellow-brown with punctures and strine darker, in thany individuals elytron almost com- pletely dark. Ventral Surface dark-brown, append ages other than pugose portion of femurs somewhat lighter. Punctures on head strong, revue and well- impressed, most less than 142 au puneture-width apatt. Punecures on pronoeruot moderately dense and strony laterally, weaker and sparser on disc, Dorsal surtace Weakly to moderately reticulare, Elytral strive well-impressed, less so on dise. Second siria on elyfron a little less (han a 1/4 length of clyiron. Punerures in strive sliglitly larger thar chose in interstriaé Punetures stronger towards sides. Interstriae not arranged ina single row, Mesosternal pillar long, well-developed, veritral cdee slopes downwards towards rear, sharply pointed on ventral rear ungle. ventral surface densely but shallowly rugose-punctate. Metacoxal process broad, square ish), lateral lobes weakly lowered, deeply and broadly pitted jn cenrre, triangularly produced backwards in midline. Midtine keel in first abdominal seument niodenuely developed in frant hall. Apical abdominal segment ootched. Rugose partion of metafemtur 2/3 length of fenur, that of mesofermur a little over |) 2, thar of profemur about 1/3 on hind ede,

Male: Protarst foar-seemented, First sexnmient noderacely expanded. second seamient small chine segment long aid thin abour lengrh of firse and second semen,

Remurks

Chis species closely resembles B reardoni but has a more vomiplexly shaped paramere and dillerently Shaped aedeagus. It seems to be a darker species than B reardant which has the rugase portions of the femora the same colour as rest of leg, Only a lew speeiniens of & reardoriare known, A clearer idea of the relationships between these two species must awail (he colleciion of further dyalecial. The preater extent of rugosily an the legs separates i from the otherwise quite similar 2 disealon Types

Holotype, mile, “LL 09'S 132-00, Black Point, Cobourg, N.T., 15-23 beh, 1977. 4. A. Weir’, in

ANIC, Paratynes; six, same data as holotype, in ANIC: ong, same data as trolorype, in CW two.'Howard Sprites, WT, light 27.68, JO8. 1, Watson’, in ANIC,

Distribution (Fig, 77), At present Known only from the coastal areas of the NVD,

Berasns timunsi sp. nov. (Figs 16, 21)

Description (dumber exanined seven) Length 3.4-4.0 nim. Oval, elytron weakly humped, highest behind middle where it is approximately 1.2 » heht of shoulder, Apex af elytvon founded er weakly trunedred. Head black, shiny, metallic Pronotun yellowish with central panel dark-brown, shiny, metllic. Elytron shiny yellow-brown, with sina, punetures and a few spots black, Ventral surface dark-brown to blak, appendages brown except for rugose portions of meso and metafemurs which are darker, Purciures on ventral surface mod vrately large, dense. Punctures an head strong. regular, well-iinpressed, mos at rear af head less than 1/2 puncturewidth apart, Punetures on pre- noruni strong, variable in size particularly lateralls less dense (han on head, well-impressed. Elytral striae well-impressed, with strong tendeney tor the inner edve of striae to he sharper than outer, Second strig an elytron 1/4 lenath of elytron, Punciuresin étriae strong and little larger (han largest on pro- nouuim, nlerstrial punctures small, subobsolete over most of elytron, Mesosternal keel moderacely developed, pillar well-developed, concave and dent: volate ou veutral cdee front and rear projections largest. Metacoxal process projecting backwards in midline, lateral lobes weakly raised, pointed behinu, weukly converging Lowards front, a wide shiny dig- mond shaped depression in midline, Keel in nividline of first abdominal segment moderately strone reaching weross mos! of seament. Rugose portian of metalemut approximately 2/3 length of femur, that an mesofemur approximately 1/2, that on pro- femur 1/2-173 length of femur Meso- and metatibiae strongly spined. Apical abdominal see- nent With song deep wide noteh lo about 1/2 distance of tiormally visible partion of segment.

Mule; Protwarsi foursegmenred, first seunent stromgly expanded. Merafemur with distinet trie angular bulge in lower Wind margin midway alone rugoase poriian.

female. Metafemur of sme speciniens show slight thickening in same arca as ip nyale.

Remarks

This species resembles the nrere widespread B Juntadisculor with whieh i t& sympatric, but differs from it (and all other Berasus) by the shape

REVISION OF BEROSUS MN

of the mule metafemut which is reminiseent of the femora of some male Dyriscids of the genus Antfiporus. The variably-sized pronotal punctures and very small interstrial punctures also separate it from B fuxtadiscolor and B. reardani,

Disrribution (Pig. 82) Known only from the wpe locality at the tip of Cape York, Old,

Tepes

Holotype, male, 'Bamayza, Old, 29/6/83, Timms’, i SAM. Seven pararypes, same data as holotype; one male. one female, in ANIC; one male, three females in CW.

Berusus niger sp. nov. (Figs 25, 30)

Description (number examined seven) Length 3.3-4.0 mm. Oval. Elyira parallel-sided, humpbacked, hivhest just behind tbe middle where iris 18 ~ the height at che shoulders. Apex of elytron nol spined. Black, portions of elytral inter- siviae in apical hall and appendages of head, dark yellow-brown. Head and pronotum with large, dense, moderately-impressed punctures. Promoturm with some scattered much smaller punctures in spaces between larger punctures. Strial punctures large, shallow. luerstilal punetures weak, ill defined, lavking lalerally and apically, Second striae approxinuuely 1/2 length of clyiron. Spaces be- tween elytral striae 8 and Y, 9 and 10, and 10 and 11 greater in the middle of elytron than elsewhere. Elytral striae 1, 3, 4, 5, 6, 7, 8 and Il ridged, pronouncedly so an stra &. The stronely-ridged stria 8 bends sharply towards apex where if is abOUL 90° to the edve of elyrron when viewed lalerally, Ventral surface rugose-punctate. Mesosteroal pillar long, ventral edge weakly concave, anrerior ventral wogle wilh very small spine, Melacoxal provess broad, squarish, with large pit in nidling; projecting baekwatds sharply in midline, continued torwards in midline by well-marked ridge, Midline keel on first abdominal sezment sirongly raised for whole length of seyment. Apical abdominal segment moderately natvhed, lateral Manges moderately developed. Rugose portion of metafemur reaching 1/2 way on posterior edge and a little less on anterior edge, rugose portion of mesofemur about 13 length of lemut, that on profernur very small. Male: Protarsi four-seemented. Basal segments not expanded, first seement somewhat longer than seeoud and third which are subequal in size.

Reatarks A north-eastern highlands species. Readily sep- araled [rom similar species by the almost completely

black colour and the fori of the lateral striae on the elytron.

Distribution (Fig. 7S) Nountalnous arcas on east coast north of Towns- ville, Old,

Types

Halotype, male, ‘Star Valley loaokoul & 3 km W of Paluma Qld, 3.ii.67, at light, LG. Brooks’, in ANIC. Paralypes: one, ‘13.6M up Whitfield Ra, Rd, Cairns, 3/11/70, J. G, Brooks, in ANIC, one, ‘Tinaroo Uk., NO. 1/73 AW.H.' in ANIC; one ‘MI, Spey, N.Q, 11/73 G.B.. in ANIC, one, “7.8M. NW Paluma, NO 5.11.73 J, G, Brooks, in ANLC; two, ‘Ausiralia N.Qid. Windsor Tableland via Mt, Carbine 11-12 Jon 1980 R. |. Store’, in QOPI.

Berosus favolatus (W. Macleay) (Figs 9, 26, 31)

Hyzrorrophus involutus W. MacLeay, 1873 p. 132.

Types

There are four specimens [rom Gayndah, Old in ANIC (on loan from the Macleay Museum), label- led ‘Syntypes’, Two of these are B palchellus and (wo B approximans. The original description does not indicate how many specimens MacLeay had be- fore him. Apart Irom the loealily there is little to connect these insects with a type series of RB favo/itus. Two specimens labelled *Hygrotrophus involutus M, L. W, Gayndah’, mounted on the same card, are in Lhe AM labelled ‘Holotype’ and num- bered K1953). They agree well with the bret des~ cription and belong to the species that subsequent workers such as Blackburn and Lea have identified as B involutus | therefore herein designate the lett- hand specimen as the leclotype of Hygratrophus invalulus W. Macleay, 1873.

Description (number examined 475)

Lengih 3.5-4.5 mim. Oval, elytra humpbacked, highes! just behind middle where about 1.5 +

height! al shoulder. Apes of elytron pounced. Head and most of pronotum black, with metallic sheen. Front and side margins of pronotum yellow-brown, ovcasionally lacking, elytron brown, punctures and striae and variable number of markings black. Ventral surface black. Appendages light-brown, tip of labial palpi and rugose portions of meso- and metafemora black, Head and pronorum with derise lane evenly-sized nearly confluent pilpetures, Interstrial punctures on elytton Jaree and well- marked, almost touching, those lowards sides and humeral angles larzer and squarer. Interstrial puncture sinall, shallow, strongest on disc, obsolete laterally. Second sina approximately half length of

I2 CPL S. WATTS

elyiron. Distance between striae seven and eight and eight and nine often slightly ereater in middle, other singe approximately equidistant! fram each other. Ventral surface rugose-punctate. Mesosternal keel in form Of a long pillar, with a small downward point at tront edge, Metacoxal process broad, sides raised, Subparallel, deeply and broadly pilted in middle, pit devoid af sculpture, projecting backward sharply for short distance in midline, lobed. Midline keel of first. abdominal segment stronyly raised for whole width of segment, Apical abdontirial sexment broadly notched with well-developed lateral Nanges, a pair of very Small tubercules on edge of middle of notch. Rugose portion of metafemur dark, reaching 1/2-2/3 along femur on anterior edge, not as far on posterjor edge

Male; Prolarsi four-se¢emented. Seemenis nol expanded, basal ttirge subequal in size.

Remarks

A common species in clear sireams and pools in the Great Dividing Range from Vie, to north Qld. Many specimens from the higher-areas of Vic, and N.S.W. are darker in colour and lack the distinctive yellow margios on the pronotum. Separated from the two related Species, B niger and Berens, by (he lack of strongly raised and bowed seventh elytral strid, tis also noticeably larger than B ares and is different in colour trom & niger. [tis only in the northern partion of ils range that B invelufus is sympatric with these two similar species.

Distribution (Fiz, 76) Coastal eastern Australia (fom southern Gane York to south-eastern Vie.

Rervsus areus sp, nov, (Figs 8, 24, 29)

Descriptian (number examined 149)

Length L-§-3,4 mm. Oval, elyira humpbacked, highest just behind middle where about 1.2 »

heighr at shoulder. Apex of elytron without spines, Black, elytral interstriae, edges af pronotum apart from central portion of rear margin, apperidages apart from tip of labial palpi ajd rugose portions of meso and metalemora yellow-brown. hlead and pronotum with dense strong evenly-sized und spaeed punctures. Strial punetures on elyiron large, alnrose touching. Literstrial punetures large bur very shallow, stronger on dise than laterally. Second stria on elytron approximately 1/2 length of elytron. Distance between striae eight and nine greatly enlareed in middle to about twice distance between slmae nine and ten, which is also slightly enlarged in middle. Stria eight moderately carinate in middle section where distance from stria nine greatest. Ventral surface rugose-punclata Mesosternal keel in wide pillar, anterior ventral angle of pillar sharply

produced downward inte small sharp point. Mera- coxal process broad, squarish, sides raised, sub- parallel, deeply and widely pitted in midline, projecling backwards sharply in midline, Midline keel on first abdominal s¢ement strongly raised for whole length ol segment, Apical abdominal seg- ment broadly notched wirh well-developed lareral flanges. Rugeose portion of metalemur reaching nearly 2/3 along posterior edge of femur and 1/3 On anterior edge, thal on mesofemur reaching a little over 1/2 length of femur an pasterior edge, 1/3 on anterior edge, that ou profemur 1/3 on posterior edge and less than. 1/4 on anterior edge,

Mole: Protars| fourseamented, basal Uiree segments subequal afi size.

Reniarks

A northern species confined to the sireanis and niverside pools of the ranges around wand to the north of the Atherton Tableland, Smaller than B involutus and & niger and readily separated trom them by colour arid the form oF the eigtith elytral stra.

Distribution (Fig, 79) Ranges of soucher Cape York and Atherton Table-