432 TRANSACTIONS OF THE 



10. C.FORMOSA. — Red-cupreous brilliant ; elytra with a three- 

 branched, broad white margin. 



C.formosa, American Entomology, pi. 6. Journal of the 

 Acad, of Nat. Sciences, p. 19. [Ante, 1, 35.] 



Length seven-tenths, breadth one-fourth of an inch. 



Inhabits the sandy alluvions of the Missouri, above the con- 

 fluence of the river Platte. 



Desc. Head red-cupreous, brilliant ; fi'ont hairy ; antennsc 

 fuscous, basal joint green, second bronzed, third and fourth pur- 

 ple ; clypeus and cheeks deep purple, the latter hairy ; labrum 

 white, with a blackish three-toothed edge, and six marginal 

 punctures; mandibles black, base above white ; palpi, basal joints 

 testaceous or pale, terminal one green tipped with bronze. 

 Trunk, deep purple, sides green, hairy ; thorax color of the head, 

 scabrous ; pectus green before : feet purple ; coxse hairy ; tro- 

 chanters bronzed ; elytra color of the head and thorax, with a 

 dilated, white, uninterrupted margin, and bluish edge, anterior 

 and posterior branches, short, intermediate band flexuous and 

 oblique, nearly attaining the suture, and with the other branches 

 dilated, equal to the margin ; hind angle not conspicuously mu- 

 cronate. Abdomen, venter exclusively purple, covered with 

 cinereous hair ; tail bronzed. 



The most beautiful, and one of the largest of the Nortli 

 American species ; in the arrangement of the bands, &e. [ 423 ] 

 of the elytra, it has some resemblance to the C. hirticollis, but 

 is a perfectly distinct species. 



[Fig. 10 of the plate by an error represents a variety of C. 

 pusilla. — Say, MS. correction.] 



11. C DECEMNOTATA. — Green above, tinged with cupreous; 

 elytra margined with bright green or bluish, four white spots 

 and an intermediate refracted band. 



C. 10-notata American Entomology, pi. 6. Journ. Acad. Nat. 

 Sciences, p. 19. [Ante, 1, 34.] 



Length three-fifths of an inch, nearly. 



Inhabits with the preceding. 



Desc. Head green, varied with cupreous and blue ; front 

 hairy, labrum white, unequal, edge black, and tridentate ; an- 

 tennae fuscous, basal joints variegated; palpi dark purple, varied 

 with green. Trunk, green, a little bronzed each side ; thorax 



[Vol. I. 



