Casey — Observations on the Staphylinidae. 149 



The male sexual characters are probably feeble and of the 

 usual form in Baryodma and allies. The sixth ventral in the 

 type of laramiensis is broadly sinuato-truncate at tip. The 

 scutellum does not extend behind the depressed base of the 

 elytra and is densely and asperately punctate. The basal 

 margin of the pronotum is finely reflexed, the surface adjoin- 

 ing feebly and finely impressed, then rising and convex to 

 the general level, the portion near the base almost irapunctate 

 except toward the middle. The punctures of the head and 

 pronotum are simple and impressed, but there are, besides 

 the pubiferous punctures, numerous very minute punctules 

 scattered over the interspaces ; the punctures of the abdom- 

 inal impressions are noticeably larger than the others but not 

 notably coarse. 



Calochara n. gen. 



In this genus and the preceding we observe a transition 

 in some respects from those having a perfectly simple and un- 

 modified mesosternal surface to the allies of Baryodma with 

 carinate mesosternum, for here we have a fine short carina in 

 about anterior half only, as in some of the species of the next 

 genus. In other features, however, the genus Calochara is 

 an isolated type. As in Aidochara, the head is unusually 

 developed. The sculpture of the anterior parts, particularly 

 of the elytra, is rather conspicuously coarse and sparce, con- 

 trasting with the fine close sculpture of all the other genera 

 of Aleocharae, excepting Eucharina. The feature which 

 however decides its isolation among the genera with strongly 

 inflexed hypomera, besides the form of the the third palpal 

 joint as stated in the table, is the form of the mesosternal 

 process, which is here finely acuminate at tip, contrasting 

 with the truncate apex in all other genera of the first group 

 of the subtribe. This very acute form of apex is common 

 among the genera having feebly inflexed hypomera, but among 

 those of the first series this is the only instance known to me, 

 for while in the genus immediately following, the mesosternal 

 process sometimes becomes very narrow, it is invariably 



