560 Coleopterological Notices, IV. 



peculiar form distinguishing Rhoptobaris and Orthoris. The pygi- 

 dium beneath emarginates the fifth segment in a rather deeply sinu- 

 ous are. In Pseudobaris the fifth segment is much less sinuate, the 

 pygidium being but slightly visible from beneath, but in Microbaris, 

 the latter is gradually, transversely tumid inferiorly and largely 

 visible behind the fifth segment when viewed from beneath. 



1 Hesperobaris suavis n. sp. — Oval, very convex, shining, black 

 throughout, the legs rufo-piceous ; setae extremely short, visible but not con- 

 spicuous, not intermixed with dispersed squamules ; sculpture rather dense. 

 Head rather deeply and somewhat closely punctate, strongly convex, the trans- 

 verse impression broad but strong, impnnctate ; beak moderately arcuate, 

 slender, densely punctate at the sides, a little longer than the prothorax ; an- 

 tennae moderate, the first joint of the funicle longer than the next three, the 

 second exactly equal to the third, and both slightly transverse, joints two to 

 seven cylindrically coarctate and gradually wider, club elongate-oval as long 

 as the six preceding joints together, densely pubescent throughout, the basal 

 joint one-third the mass and not quite as long as the second. Prothorax but 

 very slightly wider than long, the apex nearly three-fourths as wide as the 

 base ; sides feebly convergent from base to apex and feebly arcuate, the apex 

 very obsoletely constricted ; base transverse, the median lobe small and ex- 

 tremely feeble, almost obsolete ; disk with a very narrow ill-defined impnnc- 

 tate line, the punctures somewhat coarse, very dense, deep, one-half as wide 

 as the scutellum and very narrowly separated. Scutellum small, transversely 

 oval. Elytra one-fourth longer than wide, twice as long as the prothorax and 

 one-fourth wider than the latter ; sides almost straight and parallel in basal 

 three-fifths, then convergent, the apex narrowly subtruncate ; humeral tuber- 

 osities almost obsolete ; disk with not very coarse, abrupt but shallow, opaque 

 grooves, the intervals flat, subequal, scarcely twice as wide as the grooves and 

 each with a single series of rounded close-set punctures, which become coarse 

 and deep toward base but gradually very fine toward the apex. Abdomen 

 coarsely, deeply punctate toward base, more finely so behind, the punctures 

 moderately dense. Length 2.4 mm. ; width 1.05 mm. 



Texas (Austin) ; Missouri. 



The type of this interesting species is a female. The specimen 

 from Missouri is a male, and has the prothorax a little shorter and 

 the elytral sculpture decidedly stronger. 



MICROBARIS n. gen. 



Another genus allied to Pseudobaris, necessitated by a minute 

 species which I took some years since at Galveston, Texas. In 

 general facies it is quite distinct from either Pseudobaris or Hespe- 

 robaris, but the small claws, connate at base, declare its relationship 

 with these genera. 



