558 • ColeopteroJogical Notices, IV. 



than one-half of their own diameters, the niedian impunctate line 

 oljsolete. Scutelluni small, transverse, impressed in the middle. 

 Elytra quite distinctly wider than the prothorax and about twice 

 as long, cylindrical and parallel in basal two-thirds, then semicircu- 

 larly rounded behind ; disk with rather fine, very deep grooves, the 

 intervals flat, equal, twice as wide as the grooves, each with a single 

 series of small, feeble, distant and transverse punctures. The 

 impression of the abdomen in the male is rather narrow and exces- 

 sively feeble. Length 2.6-3.3 mm.; width 1.0-1.3 mm. 



Iowa and Kansas, five specimens. The setae of the elytra are 

 small, sparse, inconspicuous and unmixed with long dispersed 

 squamules, and by this means, as well as its more slender form, 

 angusta can be separated at once from nigrina. 



The change of name proposed by Dr. LeConte is unnecessary, as 

 Pseudobaris is a genus so widely separated from Baris, that there 

 cannot be a plausible possibility of its supi)ression. 



8 Pseildol»aris nigrina Say — Cure, p. 31 ; Ed. Lee, I, p. 295 (Bari- 

 dius). 



A very common and widely distributed species, occurring over 

 the entire extent of the United States. It is moderately robust, 

 oval, strongly convex, black and polished throughout, the beak 

 strongly, evenly arcuate, slender and about one-third longer than 

 the prothorax in the female, but stouter and only equal to the latter 

 in the male. The prothorax is fully two-fifths wider than long, the 

 sides broadly arcuate and convergent anteriorly, gradually becom- 

 ing parallel in basal half, the apex feebly constricted at the sides ; 

 base transverse, with a very small but prominent median lobe, the 

 disk very deeply and densely punctured, with a narrow, more or 

 less incomplete impunctate line, the punctures rather coarse, about 

 one-half as wide as the scutelluni and almost in mutual contact. 

 Elytra fully twice as long as the prothorax, the stria? deep but not 

 very coarse, the intervals flat, equal, about one-half wider than the 

 grooves, each with a single series of coarse, rather deep, rounded 

 and not very close-set punctures, the ordinary setae scarcely observ- 

 able, the widely dispersed white squamules distinct, and condensed 

 at the base of the third interval. Prosternum normally and abruptly 

 sulcate. Length 2.5-3.5 mm.; width 1.0-L6 mm. 



I have before me a series of over seventy specimens, from all 

 parts of the country, from New York and Florida (Key West), to 



