Casey — Observations on the Staphylinidae. 417 



been able to observe. There are two species represented in 

 the material before me, readily separable as follows: — 



Form stouter; aatenaae with the second and third joints relatively more 

 slender and much more elongate, equal in length, the third much longer 

 than wide, very strongly obconic and only half as wide at base as at 

 apex; body piceous -black, the head deep black, the elytra paler piceous 

 and the legs somewhat paler, the tarsi pale; antennae dusky rufous, 

 much longer than the head, scarcely at all incrassate distally, with ttie 

 basal joint about as long as the next three combined, the tenth but 

 slightly transverse ; head well developed, much elongated behind the 

 antennae, only moderately convex, very feebly dilated toward base with 

 the sides nearly straight, the angles broadly rounded and the eyes 

 small; neck but little more than a fourth as wide as the head; punctures 

 vely fine and well separated, wanting along the median line as usual, 

 still flaer, sparser and very inconspicuous on the under surface; pol- 

 ished convex edge behind the eyes rather prominent; prothorax fully 

 one-half longer than wide, distinctly narrower than the head, the sides 

 rather strongly converging and nearly straight throughout, the apical 

 angles distinct and narrowly rounded; punctures flue but distinctly 

 impressed, sparse, uneven in distribution; elytra scarcely visibly longer 

 than wide, somewhat shorter thau the prothorax but much wider and 

 evidently wider than the head; abdomen parallel, but little narrower 

 than the elytra. Length 8.0 mm.; width 1.15 mm, Utah Csouthwest- 

 ern) , — Weidt nteanus n. sp. 



Form more slender and parallel, polished, almost uniform piceous-brown 

 throughout, the legs but little paler with the tarsi pale yellow, the an- 

 tennae dark piceo-rufous, shorter and thicker than in uteanus though 

 still evidently longer than the head, the second and third joints less 

 elongate and relatively much thicker, equal in length, the third but 

 very slightly longer than wide and much less strongly and evenly obconic 

 than in the preceding, the basal joint shorter and thicker but, in like 

 manner, equal in length to the succeeding three combined; head rela- 

 tively broader and not so evidently elongated behind the antennae, just 

 visibly dilated basally, the angles more broadly rounded thau in uleanua, 

 the punctuation almost similar but sparser, almost effaced on the under 

 surface; prothorax shorter and broader, the sides and punctures almost 

 similar, distinctly narrower tban the head, with the apical angles more 

 broadly rounded; elytra much narrower than in uteanus, distinctly 

 elongate, nearly as long as the prothorax but only slightly wider and 

 barely as wide as the head; abdomen parallel, about as wide as the 

 elytra. Length 7.8 mm.; width 1.0 mm, Nevada (Elko), — H. F. 

 Wickham tarsalis n. sp. 



In both of the unique types of the above species the sixth 

 ventral is very broadly and obtusely, parabolically rounded 

 at tip and they are in all probability males. The acute side 

 margin of the prothorax continues to the apex but becomes 



