534 Coleopterological Notices, IV. 



straight, the median lobe small hut prominent, broadly rounded ; disk 

 slightly wider at apical third than at base, evenly, strongly convex, without 

 trace of median line, the punctures rather small but deep, one-third as wide 

 as the scutellum, very dense and even throughout but circular and not in 

 actual contact. Scutellum moderate. Elytra about one-fifth longer than wide, 

 one-half longer than the prothorax, and, at the rather small but somewhat 

 prominent humeri, quite, distinctly wider than the latter ; outline behind the 

 humeri hemi-elliptical, the sides distinctly convergent ; disk coarsely, deeply 

 striate, the intervals sometimes feebly alternating in width, slightly, to fully 

 one-half, wider than the grooves, each with a single somewhat uneven series 

 of coarse, deep, close-set and subrugulose punctures. Abdomen moderately 

 closely punctured. Prosternum separating the rather large coxse by one-fourth 

 more than their own width. Length 2.3-2.8 mm. ; width 1.0-1.2 mm. 



Arizona. 



This is one of the smallest species of the genus, somewhat resem- 

 bling audax in outline, but with narrower, much more coarsely 

 closely and roughly punctured elytral intervals, and differing also 

 in its entirely black body and more broadly rounded sides of the 

 prothorax anteriorly. Four specimens. 



15 Onychobaris seriata Lee. — Pac. R. R. Expl. and Surv., Ins., 

 p. 58; Proc. Ac. Nat. Sci., Phila., 1868, p. 363 (Baridius); Proc. Am. Phil. 

 Soc, XV, p. 296. 



The smallest species of the genus and very distinct from any 

 other which I have observed. It is unusually narrow and parallel, 

 moderately convex, black and polished, the beak rather robust, 

 moderately and evenly arcuate and slightly longer than the protho- 

 rax, the antennae normal in structure, the basal joint of the funicle 

 not as long as the next four and the second but very slightly longer 

 than the third. The prothorax is nearly as long as wide, parallel 

 on the sides to apical fourth, then broadly rounded and convergent 

 to the apex, which does not appear to be at all constricted ; there is 

 but feeble trace of a short median line and the punctures are deep, 

 about one-third as wide as the scutellum and separated by nearly 

 their own widths toward base, but nearly contiguous toward apex. 

 The elytra are much longer than wide and about two-thirds longer 

 than the prothorax, finely but deeply and abruptly striate, the inter- 

 vals flat, subequal, about three times as wide as the grooves and 

 each with a single series of very minute distant punctures, each 

 bearing a scarcely distinguishable seta ; the striae become quite 

 coarsely crenulate very near the base. Length 2.3 mm. ; width 

 0.8 mm. 



