422 TRANSACTIONS OF THE 



Ohs. The sexes may be distinguished from each other by the 

 three first anterior tarsal joints of the male being dilated, and 

 hairy beneath ; the last segment of the body, with an obtuse sinus. 

 The tarsi of the female are simple, the tail canaliculate towards 

 the tip. 



1. C. VULGARIS. — Obscure, on each elytron three whitish 

 bands, two of which are curved, and the intermediate one re- 

 fracted. 



Length more than three-fifths of an inch. 



Inhabits North America. 



Deac. Head blackish or obscure cupreous, green at base above, 

 front with cinereous hair ; antennae, first, second, third and 

 fourth joints green, furnished with a few white hairs before, ori- 

 gin of the hairs in punctures, which are more obvious on the 

 basal joint, remaining joints black, opaque ; labrum white, with 

 three [410] black teeth at tip and four marginal punctures, one 

 of which behind each of the lateral teeth, and one at each an- 

 terior angle ; mandibles white at the base, black within and at 

 the tip ; palpi above green, beneath purple, the second joint of 

 the laVjials white. Trunk, thorax quadrate, inconspicuously nar- 

 rowed behind, obscure cupreous, with distant hairs, subniarginal 

 impressed lines blue; feet green; thighs usually brassy-red above; 

 elytra cupreous brown or blackish obscure, with minute, irregular, 

 green punctures ; suture and external edge cupreous, each ely- 

 tron with an external lunule or curved line, originating on the 

 humerus, sometimes interrupted on the margin and curved in- 

 wards towards the tip of the elytron, intermediate band refracted, 

 at the centre of the elytron, in an obtuse angle, curved down- 

 wards, and terminating near the suture, posterior band, some- 

 what lunate, terminal. Abdomen, tcrgum greenish blue, segment 

 brownish or pale at tip; venter blue with a purple shade; tail, 

 and sinus of the male purple. 



This species I have always been accustomed to refer to C. tri- 

 fasciata, and it is not without considerable hesitation that I ven- 

 ture to give it a distinct name. Mr. Mclsheimcr considered it 

 as trifaaciato 1 and that name in his catalogue refers to the in- 

 sect under consideration ; it is also true, that it corresponds in 



[Vol. I. 



