STAPHYLINID/E 201 



the prothorax, shorter pubescence, feebler opacity and distinctly 

 in coloration; from nebulosa it differs in its longer and less incras- 

 sate antennae, smaller and more prominent eyes, deep apical sinuses 

 of the elytra, in its narrower abdomen and also strikingly in color- 

 ation; the type is a female and is pinned with specimens of a small 

 piceous-black ant. 



Leptusa exposita n. sp. Nearly as in semirufa in coloration and sculp- 

 ture though slightly more slender, the head smaller and not so transverse, 

 nearly as long as wide and but little more than two-thirds as wide as 

 the prothorax, the eyes convex and prominent, at slightly more than 

 their own length from the base, the tempora slightly less prominent, 

 parallel and nearly straight for a long distance, then rapidly and strongly 

 oblique to the base; antennae nearly as in semimfa; prothorax also similar 

 but relatively wider and more transverse; elytra notably shorter, rather 

 transverse, parallel, the sides similarly arcuate, only about a fifth or 

 sixth wider, the suture a fourth longer, than the prothorax, the apical 

 sinuses similarly deep and rather narrow; abdomen more slender, dis- 

 tinctly narrower than the prothorax and very much narrower than the 

 elytra, linear, the fifth tergite at least one-half longer than the fourth. 

 Length 2.2 mm.; width 0.46 mm. Ohio (Cincinn ti), Dury. 



Allied closely to semirufa and confounded therewith under my 

 original description (Tr. St. Louis, XVI, p. 352), but differing in 

 its smaller and narrower head, with smaller and notably more 

 prominent eyes, shorter and more transverse prothorax and elytra, 

 the former less distinctly narrower than the latter, and in its nar- 

 rower abdomen; the sex of the type is probably female. 



This semirufa section of the genus differs greatly from the tricolor 

 section in its smaller antennae, longer, parallel tempora, more 

 parallel prothorax, and in having the fourth tergite also impressed, 

 though more feebly than the first three, where the impressions are 

 much finer than in tricolor and allies; also in having the fifth tergite 

 relatively very much more elongate; it probably constitutes a 

 valid subgeneric group. 



Pasilia Rey. 



This genus was described by Rey as a subgenus of his Sipalia; 

 the latter, proving however to be a Myrmedoniid, must be removed 

 from the present tribe, leaving Pasilia as a distinct Bolitocharid 

 genus. It is remarkable for the extreme brevity of the metasternum 

 and, as correlative thereto, the more than usually short elytra, 

 these in Pasilia proper being more or less nearly as long as the pro- 



