62 MEMOIRS ON THE COLEOPTERA. 



Atheta (Hilara) pennsylvanica Bernh. Slender, parallel, rather convex, 

 somewhat shining, the reticulation distinct, coarse but feeble on the abdomen; 

 punctures fine, not dense; head and abdomen black, the latter with the first 

 two segments and apex pale testaceous; prothorax pale flavo-testaceous, 

 the elytra darker, piceo-testaceous, the legs pale; vestiture inconspicuous; 

 head slightly wider than long, slightly inflated basally, the eyes not at all 

 prominent and at very much more than their own length from the base, 

 the carinae fine, extending scarcely to the middle; antennae pale brown, 

 short and stout, gradually and distinctly incrassate distally, the basal joint 

 much longer than the second, which is only about one-half longer than wide, 

 much longer than the third, which is constricted basally, the outer joints 

 strongly transverse, separated, the last obtusely ogival ; prothorax moderately 

 transverse, widest anteriorly, where it is scarcely evidently narrower than 

 the elytra, distinctly wider than the head, the sides very feebly arcuate, the 

 median line broadly impressed throughout; elytra transverse, the suture 

 impressed, except apically, and only just visibly longer than the prothorax, 

 the apices not sinuate; abdomen rather long, parallel, almost as wide as the 

 elytra, the fifth tergite but little longer than the fourth, the sixth (c?) broadly 

 arcuate, becoming very feebly and gradually sinuate medially at apex, with 

 the punctures minute and very sparse. Length 1.5 mm.; width 0.3 mm. 

 New York (Catskill Mts.), Rhode Island, Pennsylvania and Virginia. 



Differs from palUola in the much more parallel form, shorter 

 elytra, larger prothorax and wider abdomen. 



Atheta (Hilara) unigena n. sp. Coloration, lustre and sculpture as in the 

 preceding, the abdomen however testaceous, with a blackish cloud involving 

 the fourth and about basal half of the fifth tergites; form much less parallel; 

 head slightly wider than long, not at all dilated basally, the eyes convex, 

 prominent, at more than their own length from the base, more prominent 

 than the tempora, which are parallel and then broadly rounded to the base, 

 the carinae as in pennsylvanica; antennae pale, nearly as in that species though 

 slightly longer; prothorax much smaller and rather more transverse, parallel 

 and more rounded at the sides, similarly notably wider than the head but 

 very distinctly narrower than the elytra, not impressed ; elytra much larger, 

 parallel, moderately transverse, truncate at apex, the humeri much more 

 exposed at base, the suture not impressed but very much longer than the 

 prothorax; abdomen distinctly narrower than the elytra, not so parallel, 

 feebly narrowed apically, the fifth tergite much longer than the fourth, the 

 male sexual characters feeble. Length 1.6 mm.; width 0.32 mm. New York 

 (Catskill Mts.). 



Very distinct from the preceding and more nearly of the type of 

 palliola, though differing in its larger and longer antennae, less 

 parallel abdomen, unimpressed elytial suture and larger size. 



Atheta (Hilara) validiceps n. sp. Similar in sculpture, lustre and pubescence 

 to the two preceding but larger, more parallel than in unigena, dark rufo- 

 piceous, the head a little darker than the prothorax and elytra, the abdomen 



