64 DESCKIPTION OF INSECTS 



tuves, strife with the punctures not larger than those of 



the interstitial lines. 

 Feet pale rufous. 

 Not a common species. Known by its small size. 



6. C. *laticoUis dark violaceous ; elytra black ; antennse and 

 feet rufous; head punctured; thorax at base as broad as 

 the elytra. 



Length rather more than three-fifths of an inch. 



Body hairy, deep violaceous glossed with green, beneath 

 black. 



Head punctured ; antennm reddish-brown, base and palpi ru- 

 fous ; labrum truncate, ferruginous. 



Thorax densely punctured, transverse-quadrate, narrowed 

 before, base not contracted, as broad as the elytra. 



Elytra with numerous minute punctures, strise with small 

 punctures, interstitial spaces perfectly flat. 



Feet rufous ; abdomen with small punctures. 



Approximates closely to cesthms and sericeus, but differs 



in the form of the thorax, which is proportionally larger. 



Brought from the Missouri by Mr. Nuttall. 



7. C. *impunctifro?is dark green ; elytra black ; antennre and 

 feet rufous ; head impunctured ; thorax at base as broad 

 as the elytra. 



Length three-fifths of an inch. 



Body dark green, beneatli black ; elytra black. 



Head green, polished, impunctured ; labrum emarginate, fer- 

 ruginous. 



Thorax obscure green, transverse-quadrate, punctured, 

 punctures minute, base as broad as the elytra. 



Elytra black, punctures numerous, minute, stri?e with distinct 

 punctures. 



Feet rufous. 

 Distinguishable from all the preceding ones by the glabrous 



front, and small size of the thoracic punctures. Rare. 



