INHABITING NORTH AMERICA. 68 



Pectus and postpedits with dilated glabrous punctures ; feet 



rutb-testaceous ; venter with villous piiiictuics. 

 Closely allied to sericeus atid ivdivus, hut is much smaller. 



4. C. *emarginatus green-cupreous ; elytra purplc-l)lack ; 

 antennfe and feet rufous; head punctured ; lal)rum deeply 

 emarginatcd. 



Length eleven-twentieths of an inch. 



Body green tinged with cupreous, with very short numerous 

 hairs. 



Head polished, punctured; antemm v^nCi palpi rufous; labriim 

 profoundl-y and obtusely emarginate. ierruginous. 



7'Ao/-«.r transverse-quadrate, dilated in the nnddle, |)olished, 

 densely punctured, lateral edge curved regularly to the 

 hind angles, dorsal and I)asal lines very distinct, base 

 nearly equal to the l)ase of the elytra. 



Elytra dark-purj)lc, opakc, with numerous very minute punc- 

 tures, strife punctured, interstitial lines depressed. 



Pectus and postpectus punctured ; Z^'^?^ rufous; abdomen mi- 

 nutely punctuied. 

 Very like C. (vstwus, but is readily distinguished by the 



curvatures of the thoracic edge being regularly continued 



to the posterior angles, and l)y the more deeply emargi- 

 natcd labrum. Not uncommon. 



5. C. *pusillus green, polished; elytra purple ; antenna and 

 feet rufous ; head punctured : labrum deeply cmarginate. 



Length less than seven-twentieths of an inch. 



Body with very short numerous hairs. 



Head green, polished, punctured ; nntennir and palpi rufous, 

 brownish towards the tips ; labrum piceous, deeply cmar- 

 ginate. 



Thorax with large punctures, a little contracted behind, pos- 

 terior lateral edge somewhat cxcurved, dorsal line not 

 deeply depressed, basal ones indented. 



Elytra purple, interstitial lines convex, with distinct punc- 



