Casey — Observations on the Staphylinidae. 321 



Length 1-8 mm. ; width 0.6 mm. Idaho (Coeur d'Alene), — H. F. 

 Wlckham trisectus n. sp. 



The single type is probably a small specimen, as all the 

 species vary greatly in size individually. 



Drusillota n. gen. 



" This genus is allied to Drusilla and Falagoniay the struc- 

 ture of the intermesocoxal parts being identical, but differs 

 in having a strong infra-lateral carina, extending from the 

 buccal fissure to and around the base of the head. The Mex- 

 ican Falagonia, of Sharp, is very closely allied to Drusilla 

 but has short infra-lateral carinae at base and much smaller 

 postero-lateral extensions of the buccal opening. Of Drusil- 

 lota I have seen only the following type species : — 



Form rather stout, moderately convex, highly polished, black throughout 

 the body and antennae, the elytra feebly picescent; legs pal« piceo- 

 testaceous; integuments completely devoid of micro-reliculatlon, the 

 anterior parts strongly and rather sparsely punctured, the abdomen 

 wholly without punctuation, except a few setigerous punctures prin- 

 cipally along the apices of the segments; vestiture moderately long,. 

 sparse and inconspicuous; head rather longer than wide, the sides 

 obliquely arcuate behind the eyes to the neck, which is three-fourths as 

 wide as the head; eyes moderate, but slightly prominent; punctures 

 broadly wanting along the median line; palpi long, sparsely setose; 

 Ugula with two long slender contiguous median processes; antennae 

 almost attaining the tips of the elytra, slender basally, gradually and 

 strongly Incrassate dlstally, finely, sparsely pubescent, also bristling 

 with long setae, the subapical joints distinctly transverse, the eleventh 

 not large, as long as the two preceding combined, second and third 

 elongate, the former somewhat the longer; prothorax slightly wider 

 than the head, about as long as wide, widest at apical third, where the 

 sides are broadly rounded, thence feebly converging and slightly sinuate 

 to the base, the angles obtuse but not rounded, the base arcuate; sur- 

 face feebly Impressed In nearly median third of basal two-thirds; elytra, 

 nearly one-half wider than the protiiorax but barely as long, the humeri 

 distinctly exposed at base, the sides feebly diverging, the tip broadly 

 emarginate at the suture; abdomen nearly as wide as the elytra, sub- 

 parallel, the first tergite alone distinctly impressed at base; legs long, 

 slender, the hind tarsi long, with the first joint shorter than the next 

 two combined. Length 4,8 mm. ; width 1.0 mm. South Africa (Wel- 

 lington) polita n. ap. 



But one specimen was taken by the author; it is of unde- 

 termined sex. 



