AMERICAN PHILOSOPHICAL SOCIETY. 499 



rior angles, breadth from tip to tip of the posterior angles equal 

 to the breadth of the middle, basal edge oblique each side, dorsal 

 line slightly impressed, basal lines indented, conspicuous ; elytra, 

 striae impressed, obtuse, not obsolete near the tip, punctures 

 rounded, conspicuous, interstitial lines slightly convex, third one 

 with a dilated indentation near the middle, and another behind ; 

 humerus obtusely angled ; feet dark rufous. 



Var. a. Body above bright cupreous; impressed elytral spots 

 green ; thighs and tibiae each at tip greenish. [ 84 ] 



Very simillar to the preceding species, but, independently of 

 color, it may be readily distinguished from it by the much wider 

 thorax and the impressed elytral spots. 



[Afterwards described as B. stigmaticum Dej.; B. sigillare 

 Say, infra, is probably the same species. — Lec] 



3. B. LEVIGATUM. — Abovc green, polished, beneath blackish; 

 elytral strige not impressed, punctured. 



Length rather more than one-fourth of an inch. 



Body all above green, polished, beneath blackish, polished ; 

 antennae and palpi rufous ; thorax impunctured, broadest in the 

 middle, nearly equal to the base of the elytra, contracted behind, 

 posterior angles rectangular, basal line nearly rectilinear, marginal 

 groove interrupted at the posterior angles by an oblique acutely 

 carinated line, dorsal line slightly impressed, basal ones pro- 

 foundly indented ; elytra destitute of impressed striae, punctures 

 rounded, somewhat dilated, obsolete behind the middle, inter- 

 stitial lines flattened ; feet dark rufous ; venter slightly piceous 

 on the disk. 



This species was obtained in Missouri by Mr. Xuttall. 



[Placed by me as the type of a different genus Hijdrium, 

 which I afterwards reunited with Bemhidium. — Lec] 



4. B. DORSALIS. — Greenish polished, beneath blackish ; elytra 

 testaceous, with two obsolete undulated bands. 



Length upwards of one-fifth of an inch. 



Body beneath piceous-black, polished ; head green somewhat 

 brassy ; front longitudinally convex in the middle ; antennae 

 brown, testaceous towards the base ; palpi testaceous, darker 

 towards the tip; thorax green slightly tinged with cupreouf^, 

 1823.] 



