OBBIUM. 165 



a. Prothorax less than twice as long as its 



width at base; 2nd abdominal sternite 

 of $ densely fringed with hairs pos- 

 teriorly STENHOMALUS, p. 166. 



b. Prothorax twice as long as its width at 



base; 2nd abdominal sternite of $ not 



fringed with hairs posteriorly IBIDIOXIDUM, p. 168. 



Genus OBRIUM. 



Obrium, Scrville, Ann. Soc. Ent. Fr. iii, p. 93 (1834) ; Lacord. Gen . 



CoUopt. viii, p. 361 (1869). 

 Phyton, Newman, The Entomologist, i, p. 19 (1840). 



Type, 0. cantharinum, Linn., a European species. 



Range. Europe, Northern Asia, North and Central America, 

 Burma, Borneo, and Mauritius. 



Head subvertically sloped in front ; the clypeus limited above 

 by a rather deep, arcuate impression ; palpi short, the maxillary a 

 little longer than the labial, last joint slender subcylindrical ; eyes 

 large, deeply emarginate. Antennae about one-third longer than 

 the body in the <$ , very little longer than it in the $ , sparsely 

 furnished with long hairs ; third and fourth joints subequal^ 

 shorter than the fifth, fifth to tenth subequal, or gradually 

 diminishing in length. Prothorax longer than broad, tuberculate 

 or protuberant at, or before, the middle of each side, constricted 

 near the base and also, but to a less extent, near the apex. 

 Elytra parallel-sided, or slightly widened posteriorly, broadly 

 rounded at the apex. Legs moderately long ; femora clavate and 

 pedunculate ; front coxa3 strongly exserted, almost contiguous ; 

 first joint of hind tarsus as long as the second and third united. 

 Episterna of metathorax marked with a deep longitudinal groove. 

 First abdominal segment of c? as long as the next three segments 

 united, the second nearly twice as long as the third ; first 

 segment of $ as long as the rest of the abdomen, the second 

 densely fringed with hairs posteriorly, the third very short, the 

 fourth and fifth longer. 



178. Obrium posticuni, Gahan, Ann. M.us. Civ. Genova, xxxiv. p. 14 

 (1891). 



Yellowish -testaceous ; with the front of the head, the legs 

 (excepting the stalks of the femora) and the apex of the elytra 

 pitch-black ; the first four joints of the antenna black, the rest 

 dingy yellow. Head very finely and sparsely punctulate. Pro- 

 thorax tuberculate at the middle of each side, constricted near the 

 base and to a less extent near the apex ; minutely and sparsely 

 punctulate above, with a nearly obsolete median tubercle on 

 the posterior part of the disc. Elytra distinctly and rather 



