INHABITING NORTH AMKKICA. gg 



Thorax black, slightly bronzed, impunctured, narrower than 

 the elytra and contracted a little towards the base, broadest 

 rather before the middle, posterior angles acute, promi- 

 nent, from tip to tip not equal to the diameter before the 

 middle, dorsal lines distinct, basal lines abbreviated, in- 

 dented, somewhat dilated, marginal groove uninterrupted 

 at the hind angles, basal edge oblique each side. 



Elytra bi'onzed, stritc impressed, not obsolete near the tip, 

 punctures approximated, interstitial lines flat, tliird with 

 two punctures on the outer edge, one near the middle, 

 and the other behind. 



Pectus ^nd. posipectus impunctured, deep blueish green. 



Feet piceous ; troclmntevs and base of the thighs paler. 

 Panzer has applied the na?iie which Mr. Mclsheimer 



adopted to a different insect of this genus. 



2. B. *punctato-striatiim blackish, beneath dark green po- 

 lished, thorax hardly narrower than the elytra, basal line 

 oblique eacli side. 



Length from one-fourth to nearly three-tenths of an inch. 



Body all above black obsoletely bronzed, beneath deep green 

 highly polished. 



AntemiK fuscous, basal joint rufous ; palpi rufous at base, 

 darker towards the tip. 



Thorax broadest in tlie middle, narrowed before, somewhat 

 contracted before tiie posterior angles, breadth from lip 

 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^ stripe impressed, obtuse, not obsolete near the (ip, 

 punctures rounded, conspicuous, interstitial lines slightl\ 

 convex, third one with a dilated indentation near the mid- 

 dle, and another I)cliind. 



Humerus obtusely angled ; feet dark rufous. 



Var. a. Body above bright cupreous; im|)resscd clytral spots 

 green ; thighs and tiliia each at tip greenish. 



2 



