Casey — Observations on the Staphylinidae. 157 



setulose than in sculptiventris, the basal joint unusually short, shorter 

 than the fifth and shorter than the next two combined. Length 3.3-4.2 

 mm.; width 0.73-1.0 mm. California (San Francisco, Humboldt Co., 

 and Lake Tahoe), Nevada (Reno) and Montana (Kalispell). 



imbricata n, sp. 



Moderately stout, shining, nearly similar in general form, coloration and 

 sculpture to the preceding, the head larger, rather more than half as 

 wide as the prothorax, the antennae somewhat less elongate though 

 evidently longer than the head and prothorax, the tenth joint more 

 evidently wider than long, the eleventh much longer than the two pre- 

 ceding combined, the second and third subequal; prothorax less trans- 

 verse, about two-flfths wider than long, the sides less converging from 

 base to apex and more rounded ; elytra about equal in length and width 

 to the prothorax, the suture four-fifths as long as the latter, the pale 

 spots somewhat larger and more anteriorly angulate; abdomen nearly 

 similar throughout; mesosternal process nearly similar but arcuately 

 narrowing toward apex through a greater distance from the tip, the 

 metasternal process equally broad and obtuse ; hind tarsi relatively 

 longer, the tibiae shorter, the basal joint relatively much abbreviated, 

 scarcely more than two-thirds as long as the fifth and one- half longer 

 than the second. Length 3.0 mm. ; width 0.85 mm. New Jersey. 



idonea n. sp. 



More slender, linear, the body and antennae black, the latter piceous 

 toward base; legs blackish, paler distally, the elytra black, without dis- 

 tinct maculation but becoming broadly and sufEusedly piceo-testaceous 

 toward the inner apical angles; scnlpture and vestiture throughout 

 nearly as in the two preceding species; head about half as wide as the 

 prothorax; antennae long, feebly incrassate, nearly as in imbricata but 

 with the tenth joint more distinctly wider than long and the second and 

 third equal; prothorax nearly as iu imbricata; elytra transverse, much 

 shorter than in imbricata, shorter than the prothorax but fully as wide, 

 the suture scarcely four-fifths as long; abdomen nearly similar; meso- 

 sternal process nearly similar but with the carina less acute and the tip 

 not concealing the apex of the metasternal process, which is evidently 

 more narrowly parabolic In form ; hind tarsi not so markedly shorter 

 than the tibiae as in imbricata and more elongate, the tibiae relatively 

 shorter, the very short basal joint nearly as in idonea, the first three 

 almost uniformly decreasing in length. Length 3.5 mm.; width 0.77 

 mm. California (Colorado Desert at Salton),— H. F. Wickham. 



salicola n. sp. 



13 — Mesosternal process wide as usual 14 



Mesosternal process very narrow; species small in size; punctures of the 



abdominal impressions much finer 21 



14 — Sides of the prothorax strongly converging from base to apex and only 



moderately arcuate 15 



Sides of the prothorax feebly converging and strongly arcuate ; antennae 

 rather strongly incrassate, with the tenth joint about twice as wide as 

 long, the second and third moderately elongate and subequal; basal 

 joint of the hind tarsi about as long as the next two combined 20 



