Casey — Observations on the Staphylinidae. 341 



Form nearly similar, equally shining and similarly sculptured, the pubescence 

 rather shorter, black, the abdominal apex rufescent, the elytra dark 

 piceo- testaceous; legs pale brown, the antennae blackish, paler basally, 

 nearly as in helenica but somewhat shorter, not quite extending to the 

 tip of the elytra, the second joint more distinctly longer than the third; 

 head nearly similar but more abruptly constricted at base; prothorax 

 rather shorter and more transverse, nearly a fourth wider than long 

 and a fourth wider than the head, the sides parallel and similarly 

 feebly arcuate, the small impression at the base also similar; elytra 

 shorter and more transverse, slightly wider than the prothorax and a 

 fourth longer; abdomen parallel and straight at the sides, evidently 

 narrower than the elytra. Length 4.2 mm.; width 0.85 mm. Cali- 

 fornia (Lake Tahoe) tahoensis n. sp. 



Form much shorter and less convex, less shining, more strongly micro- 

 reticulate, the elytra very dull; punctures very close-set throughout; 

 pubescence short and rather inconspicuous; color blackish, the elytra 

 castaneous, the abdomen pale at tip, the legs pale brown; antennae 

 nearly similar, blackish, the first joint testaceous, not quite extending 

 to the tips of the elytra, the distal joints obtrapezoidal, the second 

 but slightly longer than the third, four to seven longer than wide, 

 eight to ten as long as wide, the eleventh not as long as the two pre- 

 ceding combined; head nearly as in tahoensis but having a small im- 

 pression at the middle of the vertex; prothorax relatively smaller, 

 more than a fourth wider than the head, a fifth wider than long, par- 

 allel and broadly, feebly arcuate at the sides, the basal angles similarly 

 obtusely rounded, the surface with a much larger and more conspicu- 

 ous rounded impression before the scutellum ; elytra large, a third 

 wider and two -fifths longer than the prothorax, only slightly wider 

 than long, not very evidently impressed behind the scutellum, the 

 humeri more exposed at base; abdomen parallel, narrower than the 

 elytra, more shining than the anterior parts, the punctures sparse 

 toward tip, close-set elsewhere. Length 3.8 mm. ; width 0.93 mm. 

 Idaho (Coeur d'Alene), — H. F. Wickham fnscnla n. sp. 



Form stout and rather feebly convex as in fuscula, similarly dull and strongly 

 micro-reticulate, the abdomen less finely sculptured and reticulate 

 rather than strigilate, somewhat less shining; punctures similarly very 

 fine, dense on the elytra; color pale yellowish-brown throughout, the 

 head more piceous, the abdomen with a large picescent cloud before the 

 apex; antennae fuscous, the basal joint pale, more slender, extending 

 almost to the tips of the elytra, the second joint but slightly longer than 

 the third, joints four to eight very distinctly, nine and ten slightly, 

 longer than wide, the eleventh sharply pointed, not as long as the two 

 preceding combined; head as wide as long, the sides arcuate and con- 

 verging behind the eyes, which are more prominent, the vertex with a 

 feeble median impression; prothorax much larger than in fuscula, about 

 a fifth wider than the head and a fourth wider than long, widest at 

 apical two-fifths, the sides feebly arcuate, becoming very slightly con- 

 vergent and straighter toward base, the ante-scutellar impression very 

 small and feeble as in helenica; elytra large, about a third wider and 

 nearly one-half longer than the prothorax, the humeri somewhat ex- 



