96 PROCEEDINGS OF THE NATIONAL MUSEUM vol.87 



Integuments not highly polished, rather densely punctate, with 

 ground sculpture in part - - Homoeotarsua 



A. Eyes placed just behind middle of head _ subgenus EaciTpUna 



Eyes placed in front of middle of head B 



B. Subbasal abdominal segments modified in male 



Only apical segments modified in male D 



C. Seventh sternlte of male with a densely pubescent depression at middle; 



eighth sternlte emarginate. subgenus Nemoeo(iu> 



Seventh sternite of male without depression at middle; eighth sternite not dis- 

 tinctly emarginate subgenus Gastrolobinm 



D. Male with seventh sternite abruptly emarginate subgenus HomoeotarsBB 



Male with seventh sternite not abruptly emarginate B 



E. Eyes minute, at over 6 times their diameter from base; elytra shorter than 



pronotum — subgenus Homoeoblom ' 



Eyes small, at less than i times their diameter from base; elytra longer than 

 pronotum subgenus He^teroblnm 



12. Labrum not dentate.. _ 13 



Labrum bidentate (the denticles sometimes obtusely rounded) ..Cryptobium 



A. Neck less than half as wide as head; antennal grooves obsolescent... subgenus Ababactm 



Neck more than half as wide as head; antennal grooves completely separating 



eyes from anterior margin of head B 



B. Subbasal stornites of males modified subgenus Neobsctiu* 



Subbasal sternltes of males not at all modified 



O. Basal segment of antennae two-thirds as long as bead; bead and generally 



pronotum with very fine ground sculpture subgenus CiTptoblella 



Bksal segment of antennae one-half as long as head; without ground sculpture 



subgenus Ciyptobima 



• Nmoeotas, new subgenus. Diagnotit: Characters of genus Homoeotarsut except as follows: Eyes 

 moderately small, placed in front of middle of head; fourth and fifth stemites of male with transverse setose 

 foveae at middle, seventh with a densely pubescent depression at middle, eighth emarginate. 



• Homoeobium, new subgenus. Diagnosit: Characters of genus Homoeotarsttt except as follows: Eyes 

 minute, separated by more than 6 times their diameter from base of head; elytra unusually short, shorter 

 than pronotum. 



Homoeotarsns (Homoeobium) bakerianns, new species. Description: Head black, pronotum, elytra, 

 and abdomen rufopiceous. Head robust behind, with basal angles obliterated; eyes very small, separated 

 from base of head by 6 times their length; basal segment of antennae longer than next three together; gular 

 sutures parallel and approximate in front; with rather large and dense punctures, not very abrupt but some- 

 what umbilicate, almost absent between antennal prominences, intervals rather flat; without distinct ground 

 sculpture. Pronotum longer than wide, widest in front, feebly narrowed to narrowly rounded posterior 

 angles; with a narrow irregular impunctate midline; punctures as on head but a little less dense; without 

 ground sculpture. Elvira about as wide as long, closely appressed to thorax; very indefinitely punctate, 

 the large depressions separated by irregular convex intervals. Abdomen punctured as elytra but with the 

 depressions more punctiform and sometimes submuricate. Male, eighth sternite with an excision one- 

 half longer than wide with sides parallel at apex, which is rounded and expanding posteriorly, segment 

 flattened or impressed in front of excision. Female, unknown. Length, 11 mm. Tvpe locality, Philippine 

 Islands, Bagulo, Benguet Province. Tvpe», holotype and paratype, males, U.S.N.M. No. 62660, coUected 

 by C. F. Baker. 



• Neobactns. new subgenus. Diagnorit: Characters of genus Crpptobium except as follows: Male, fourth 

 sternlte with a more or less circular modification near the middle of the posterior border, fifth sternite with 

 a large oval fovea or spongy area posteriorly on segment at middle. 



Ababactna (Neobactns) nnnenmacherl, new species. Deicription: Black, abdomen ip part rufescent. 

 Head with basal angles rounded from eyes, which are at nearly 3 times their length from base; labrum trun- 

 cate m front, with two blunt prominences separated by a feeble, rounded emarglnation; gular sutures feebly 

 converging to basal third; punctures very scattered, generally separated by twice their diameter, unusually 

 large but not distinctly umbUicate, with dense but not coarse ground sculpture throughout. Pronotum 

 a little longer than wide, sides feebly arcuate, a little wider anteriorly; punctures a little finer than on head, 

 arranged In part along a median smooth area, ground sculpture as on head. Elytra coarsely and rather 

 densely punctured, the intervals more or lese convex and vaguely coriaceous. Abdomen with small and 

 indefinite punctures, each excavated behind. Male, fourth sternite with a circular elevation at middle of 

 posterior border, bearing a very large puncture; fifth sternite with a large oval spongy area posterioriy at 

 middle; seventh sternite very feebly bilobed at center; eighth sternite with an abrupt Impression 3 times as 

 ong as wide and within this depression a narrow excision, rounded at apex and enlarged posterioriy, more 

 ^^^,11ZV°''\'''^T'''Z^^^^- -P''""". unknown. Length, B mm. Type locality, Aiizons. Nog^es, 

 Santa Crui County. Typet, holotype, male, U.S.N.M. No. 52661, collected on August 24. 1906. by F. W, 

 Nunenmacber. f • * 



