Coleopterological Notices, IV. 533 



13 Onycliobaris amMgua n. sp. — Oblong, convex, piceous-black 

 and rather dull throughout, the head, beak and legs obscurely rufescent ; 

 sculpture very dense ; setae rather long, erect, forming conspicuous bristling 

 series on the elytra. Head near the apex and beak finely but strongly, very 

 densely punctured, the transverse impression feeble and only narrowly and 

 imperfectly impunctate ; beak rather slender, evenly, strongly arcuate, scarcely 

 at all tapering, equal in length to the prothorax, the median subcariniform 

 line almost obsolete ; antenna? moderate, the second funicular joint fully one- 

 half longer than the third. Prothorax scarcely more than one-fourth wider 

 than long, the sides parallel and straight nearly to apical fourth, then evenly, 

 strongly rounded but not prominent, thence strongly convergent and nearly 

 straight to the apex which is not distinctly constricted ; base transverse, 

 straight, the median lobe rather small but rounded and prominent ; disk with 

 barely a trace of an impunctate line, rather finely, deeply, extremely densely 

 punctate throughout, the punctures scarcely one-third as wide as the scutel- 

 lum, circular and not polygonally distorted. Seutellum moderate. Elytra 

 not longer than wide, barely two-fifths longer than the prothorax, and, at 

 base, rather abruptly a little wider than the latter ; outline thence hemi- 

 elliptical ; disk with not very coarse, moderately deep stria?, the intervals flat, 

 subequal, nearly twice as wide as the striae, not very coarsely but deeply, 

 closely punctate, the punctures forming somewhat uneven single series on 

 each. Abdomen moderately closely punctured. Length 2.8-3.0 mm.; width 

 1.35-1.6 mm. 



Arizona. 



A somewhat small species, closely allied to pauperella, but easily- 

 distinguishable by its larger size and more robust form, also by its 

 shorter elytra, not only actually but relatively to the prothorax ; 

 the sides of the latter are parallel in basal three-fourths in this 

 species, but feebly convergent toward base in basal two-thirds in 

 pauperella, the widest part of the disk in the latter being at apical 

 third. The prothorax is longer in ambigua, and the elytral inter- 

 vals wider. It is represented by four specimens, one of which is 

 contained in the collection of the National Museum, and was prob- 

 ably collected by Mr. Morrison. 



14 Onychobaris pauperella n. sp.— Oblong, suboval, convex, 

 feebly shining, black, the head, beak and legs dark rufo-piceous ; seta? 

 moderately long, distinct and forming rather conspicuous single series on the 

 elytra. Head finely, rather sparsely punctate toward apex, the beak densely 

 punctured at the sides, rather thick, equal in length to the prothorax, feebly 

 tapering from base to apex, evenly and strongly arcuate ; antenna? moderate, 

 the second funicular joint but slightly longer than the third. Prothorax nearly 

 one-third wider than long, the sides feebly divergent and nearly straight to 

 apical third, then gradually broadly rounded and convergent to the apex, 

 which is minutely and scarcely visibly constricted ; base transverse and 



