Oryctoderini

Key to genera of Oryctoderini View in CoL

1 ( 16) Pronotum in both sexes simply convex, without pit or tubercle.

2 ( 3) Clypeus bifurcate. Frons with two tubercles. Antennae 9-jointed. Anterior tarsi of males weakly thickened. Sides of elytra in femalessimple.Withoutlateraldilationorknob.Onychiistrikinglystrong. 23-33mm,NewGuinea.............. Onychionyx View in CoL

3 ( 2) Clypeus rounded and truncated, either slightly emarginated or only with one tooth.

4 ( 5) Antennae 9-jointed. Clypeus rounded. All angles of pronotum obtuse. Surface metallic or black, elytra with white or yellowish scales.Bothapicalteethof anterior tibiaeinmalesunited, tarsislightlythickened, infemalesallthreeteethfree andtarsithin. Propygidiumwithtworowsofstridulatorytubercles. 12-22mm,SolomonIs...................................... Chalcasthenes View in CoL

5 ( 4) Antennae 10-jointed.

6 ( 9) Surface of elytra along suture more strongly convex than of disc.

7 ( 8) Pronotum in both sexes simply convex. Frons with two tubercles, in female much weaker than in males. Clypeus broad, apex broadlyupturned.Prosternalprocesshigh.Pygidiummoderatelyconvex,notretractedventrally.Anteriortarsiinmalesstrongly thickened,innerclawverybig,stronglycurved. 33-45mm,NewGuineatoSolomonIs........................ Coenoryctoderus

8 ( 7) Pronotum behind anterior margin with a small tubercle, frons with one tubercle. 28-33 mm.

9 ( 6) Surface of elytra regularly convex.

10 ( 11) Basaltooth of anterior tibiae farther removed fromapicalteeth. Surface oily, elytra withor withoutbright pattern,finely or stronglypunctate. Pronotumwithorwithoutmetalliclustre.Anteriortarsiofmalesscarcelythickened. 33-49mm,NewGuinea.............. Chalcocrates

11 ( 10) Basal tooth of anterior tibiae not, or scarcely removed from apical teeth. Pronotum without metallic lustre, elytra either shining or pale and strongly punctate.

12 ( 13) Elytra shining, smooth or microscopically granulated. Clypeus truncate, sides often more or less deeply emarginated. Frons withorwithoutatubercleinthemiddle.Epipleuraofelytraweak. Prosternalprocesshigh. Propygidiumwithoutstridulateory organ. Pygidiuminmalesstronglyretractedventrally,infemalesonlyconvex.Hindfemorethickened,anteriortarsiinmales stronglythickened. 20-40mm,PapuanIs............................................................................ Oryctoderus

13 ( 12) Elytra strongly punctate, oily or near pale. Propygidium without stridulatory area. Anterior tarsi in males thickened.

14 ( 15) The upturned apical margin of clypeus in the middle with an obtuse tooth. Frons with two tubercles. Mandibles angularly dilated. Anarrowbandonsidesof elytrafinelypubescent,lateralmargininfemaleswithoutdilationorknob. Anteriortibiae withtwo teeth,tracesofathirdoftenvisible. 16-26mm,PapuanIs.,AdmiraltyIs............................................ Melanhyphus

15 ( 14) Apex of clypeus truncated, slightly convexly curved, in the middle without an obtuse tooth. Frons unarmed. Mandibles in males dilatedtowardsapex,latterbroadlytruncated,sidesslightlyconcavelycurved,infemalescontractedtowardsapex. Sidesof withoutapubescentband,infemalesinorbehindthemiddleaknobpresent.Anteriortibiaewithtwoorthreeteeth. 22-28mm, ThePhilippines,SulawesiIs.,NewGuinea,BismarckArchipelago................................................... Neohyphus

16 ( 1) Pronotum with a depression and with one to two tubercles in males. Apex of Clypeus truncate, with a horn in the middle. Antennae 10-jointed.

17 ( 20) Anterior tarsi of males thickened.

18 ( 19) Mandibles bifurcate, sides slightly curved. Elytra strongly punctate, oily or near pale. Propygidium without stridulatory area. Anteriortibiaewiththreeteeth.Anteriortarsiofmalesstronglythickened. 20-26mm,LuzonIs................ Ceratohyphus

19 ( 18) Mandibles rounded in apex, not bifurcate. Elytra smooth. Propygidium without stridulatory area. Anterior tibiae with three teeth. Anterior tarsi of males weakly thickened. 34-35 mm, Sulawesi Is.............................. Paroryctoderus

20 ( 17) Anterior tarsi of males simple, not thickened.

21 ( 22) Body long, cylindrical. Pronotum of males behind anterior margin narrowly depressed, behind with two more or less strong t ubercles,sameoffemalesimplyconvex.Elytrasparselyandfinelypunctate.Anteriortibiaewithsmallaccessorialteethbesidebasal tooth.Apexofhindtibiaewith3-4triangularteeth.Tarsiverylongandthin. 24-30mm,NewGuinae..................... Hatamus

22 ( 21) Body broader. Pronotum in both sexes with a small apical tubercle and behind tin male with a distinct impression (in female lacking).Elytra withdense and smallannulate punctures.Anterior tibiae tridentate,without accessorial teeth,apexof tibiaetriangularlyproduced.Tarsinormal,neitherverylongnorthin.28-33, Australia.......................... Oryctoderinus

Wada K.,1990.–Anew speciesof the genus Peltonotus Burmeister

( Coleoptera , Scarabaeidae , Rutelinae ). Lamellicornia, (6): 1 - 4.