STAPHYLINID.E. 33 



basal angles, the sides thence rather strongly converging and arcuate 

 to the narrowed apex, the base rounded; elytra very moderately trans- 

 verse, fully as wide as the prothorax, the suture a fifth longer, parallel, 

 the apical sinuses feeble and shallow; abdomen evidently narrower than 

 the elytra, rather slender and subparallel, the margins not noticeably 

 thick, the fifth tergite nearly one-half longer than the fourth. Length 

 2.5-2.65 mm.; width 0.5-0.6 mm. New York (Catskill Mts.). 



Allied rather closely to obliqita, from Norfolk, Va., but with the 

 head relatively not so large and the antennae smaller, less incrassate 

 distally and paler; the abdomen is relatively a little more slender 

 and less thickly margined and the apical sinuses of the elytra much 

 shallower. 



Oxypoda latebricola n. sp. Similar in coloration and sculpture to 

 the preceding and with the same strong and conspicuous abdominal 

 sculpture, but much stouter in form of body and more parallel; head 

 similar in form and size, the eyes at less than their own length from the 

 base, flatter and unusually coarsely faceted; antennae slightly more 

 developed but of the same general structure, the constriction of the last 

 joint feeble and a little behind the middle ; prothorax well developed, not so 

 short, widest less basally but otherwise nearly similar; elytra similar in 

 form but relatively narrower, evidently not as wide as the prothorax, 

 the suture about a fifth longer than the latter, the apical sinuses rather 

 deep and distinct; abdomen broader and much more thickly margined, 

 not distinctly narrower than the elytra, subparallel, the fifth tergite 

 but slightly narrower and a third longer than the others; hind tarsi 

 moderate in length, the basal joint, as usual in this group of species, being 

 not longer than the next two combined. Length 2.4 mm.; width 0.63 

 mm. Pennsylvania (near Philadelphia). 



Distinguishable from the preceding by its more inflated prothorax, 

 broader and more strongly margined abdomen and deeper apical 

 sinuses of the elytra; the abdomen is still broader and a little more 

 heavily margined than in obliqua and the fifth abdominal tergite 

 is relatively shorter and broader than in either of those species. 



Oxypoda congesta n. sp. Very stout, moderately convex, subparallel, 

 very feebly shining, the punctures minute, dense, asperulate, the ab- 

 dominal sculpture as in the preceding; color dark blackish-brown, the 

 head and most of the abdomen more nearly black; vestiture rather long, 

 palish, abundant; head fully three-fifths as wide as the prothorax, trans- 

 verse, the sides short and parallel, the eyes not prominent, at two-thirds 

 their length from the base; antennae black, the three basal joints dark 

 testaceous, rather thick, distinctly incrassate, the first joint fully as 

 long as the second and thicker, the third much shorter, fourth as long as 

 wide, fifth larger and decidedly transverse, tenth one-half wider than 

 long, the last as long as the two preceding, gradually pointed, the con- 



T. L. Casey, Mem. Col. II, August 1911. 



