426 TRANSACTIONS OF THE 



C. <o-guttata, d'un vert bleuatre brilliant ; elytres avec trois 

 points blanchatres, sur le bord exterieur. Oliv. Ent. No. 33, pi. 

 2, fig. 21, a. 



C. <0'(juttata, elle brille du plus beau verd-blcu. Le pattes 

 sont bleues, les yeux blancs. Herbst. Arch. p. 159, pi. 27, fig. 

 17. 



Length of the male more than half an inch. 



Inhabits North America. 



Desc. Head green, sometimes glossed with blue; antennae, 

 four basal joints green, remainder black-brown ; labrum white, 

 edged with brown, three triangular teeth before, and six margi- 

 nal blackish punctures each of which latter furnishes a hair ; 

 mandibles white above, tip black ; palpi green ; eyes brown. 

 Trunk green, tinged beneath with blue, but without a cu- 

 preous tint, hairs remote and short; feet green; trochanters 

 brassy ; intermediate tibia with more numerous short hairs near 

 the tip behind ; elytra green, brilliant, behind the middle blu- 

 ish-purple, which deepens towards the tip, hind margin rounded, 

 obscurely serrate, sutural margin not abbreviated nor mucronate 

 at tip, each elytron marked by three marginal white dots, the 

 first placed in the middle of the margin, one at the posterior 

 curve, and the third transverse and terminal ; inferior page 

 blackish, marginal spots testaceous. Abdomen, venter bluish- 

 green, segments margined, bronzed, edge and tail purple. [415] 



Var. a. Elytra each with an additional spot, which is fulvous 

 or white, and generally inconspicuous, placed behind the middle 

 triangularly with respect to the two anterior, marginal ones. 



Var. /?. Each elytron with a single marginal spot, the two 

 posterior ones wanting. 



This insect is common in Pennsylvania, but not so frequent 

 a.s either vulgaris or hirticollis. Its characters are strong and 

 discriminative, so that our synonymes are free from doubt, al- 

 though that of Herbst represents the eyes as white ; but this 

 color is, as in some of the Carabi and many other insects, only to 

 be found in the dried specimen, and is by no means universal. 

 The second variety was brought from the banks of the Missouri, 

 above the confluence of the river Platte, by Mr. Thomas Nuttall. 



5. C. DORSALis. — Bronzed, elytra white, each with two curved 



[Vol. I. 



