AMERICAN PniLOSOPniCAL SOCIETY. 409 



rior angles, breadth from tip to tip of the posterior anj^les C4ual 

 to the breadth of the middle, biisal edge oblique eaeh side, dorsal 

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

 strijE 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 j feet dark rufous. 



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

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



Very siniiliar to the preceding species, but, independently of 

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

 thorax and the imjiressed elytral spots. 



[Afterwards described as Ji. sfojnuid'rion Dej.; B. siijillare 

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



8. U. LEVKiATUM. — Above green, polished, beneath blackish ; 

 elytral strisc not impressed, punctured. 



Length rather more than one-fourth of an inch. 



Body all above green, poli.^^hcd, beneath blacki.sh, polished ; 

 antenna; and palpi rufous ; thorax impunctured, broadest in the 

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

 posterior angles rectangular, ba-salliue nearly rectilinear, marginal 

 groove interrupt'cd 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, somewhst dilated, obsolete behind the middle, int-er- 

 stitial lines flattened ; feet dark rufous; venter slightly piceou* 

 on the disk. 



This species was obtained in Missouri by Mr. Nuttall. 



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

 which I afterwards reunited with Br.mbidium. — Lec] 



4. B. DORSALis. — (Jreenish 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 somewhar. 

 brassy ; front longitudinally convex in the middle ; antennae 

 brown, testaceous towards the base ; palpi testaceous, darker 

 towards the tip; thorax green slightly tingc'd with cupreous, 

 1823.] 



