96 AMERICAN COLEOPTERA. 



median line fine, abbreviated before and behind ; transverse impressions rather 

 feebly marked, the anterior distant from the apex ; basal impressions moderately 

 deep, obsoletely bistriate ; sides with the margin narrowly retlexed, strongly 

 arcuate nearly to base, sinuate in front of the hind angles, which are rectangular 

 and finely carinate. Elytra less than one-half wider than the thorax, oblong- 

 ovate, moderately finely striate; striae entire, finely punctate to behind the mid- 

 dle, the seventh slightly grooved at tip; intervals flat, the third with the first 

 dorsal puncture about one-third from base, the second about one-third from apex. 

 Beneath black, sometimes feebly tinged with green, shining. Legs testaceous, 

 the femora rarely slightly darker. Length .22-.25 inch ; 5.5-6.25 mm. 



Most nearly related to the preceding, with which it agrees in hav- 

 ing the thorax very distinctly narrower at base than apex, cordate, 

 with the basal impressions obsoletely bistriate, the outer stria being 

 often very difficult of detection. The head is much more coarsely 

 alutaceous and wider than in insulatum, and the thorax is wider as 

 compared with its length, nearly truncate at apex, distinctly aluta- 

 ceous, and with the sides more strongly arcuate and sinuate for a 

 shorter distance behind. The color is also different, and the form 

 slightly more depressed. 



It was described by LeConte from New York. It is known to 

 me also from Missouri, Nebraska, Colorado, the Indian Territory 

 and Texas. 



67. B. nubiculosuill Chaud. — Form robust, moderately convex; color 

 aeneous or nigro-seneous, the elytra marked nearly as in cordatum. the markings 

 less clearly defined ; epipleurse i)ale. Head finely alutaceous. as wide as the tho- 

 rax at apex ; palpi rufous; antennae about one-half the length of the body, fus- 

 cous. Prothorax cordate, rather more than one-half wider than long, distinctly 

 narrower at base than apex, scarcely rugose at base : apex truncate ; median line 

 fine, abbreviated before and behind ; transverse impressions moderately distinct; 

 basal impressions deep, bistriate ; sides with the margin narrowly reflexed. ar- 

 cuate to behind the middle, sinuate in front of the hind angles, which are rect- 

 angular and carinate. Elytra nearly one-half wider than the thorax, oblong-oval, 

 moderately deeply striate; striae entire, punctate to behind the middle, the sev- 

 enth slightly grooved at apex ; intervals nearly flat, the third with the first dorsal 

 puncture about one-third from base, the second about one-third from apex. Be- 

 neath nearly black, shining, the abdomen sometimes rufo-piceous or rufous, espe- 

 cially towards the tip. Legs rufous. Length .16— .20 inch ; 4-5 mm. 



Smaller and more convex than the two preceding, with the basal 

 impressions of the thorax more distinctly bistriate, and the form less 

 elongate. In some respects it seems to lead towards those that follow. 

 It is quite easily recognizable from its allies by the characters above 

 given and seems subject to but slight variation. The thorax, although 

 distinctly narrower at base than apex, is less narrowed behind than 

 in cordatum and insulatum. 



It is known to me from Utah, Texas, New Mexico, Arizona and 

 California. 



