AMERICAN PHILOSOPHICAL SOCIETY. 429 



7. C. OBSCURA. — Black, each elytron with two white marginal 

 spots and a terminal lunule. 



C. ohscura, nigra, elytris punctis duobus marginalibus, lunulaT 

 que apicis alba. Fabr. Syst. Eleut. 1, p. 238. 



Inhabits North America. 



Dcsc: Head black, naked ; antennre brown at tip ; clypeiis 

 large ; labrum white, three-toothed, not emarginate, at the ante- 

 rior angles, margin with about six punctures, of which one is 

 placed each side of the larger central tooth ; mandibles white 

 on the exterior base above ; palpi piceous. Trunk, black, imma- 

 culate ; elytra tinged with brown on the posterior half, punctures 

 minute, not deeply impressed, two white marginal maculae, of 

 which the anterior one is smaller, rounded, and placed near the 

 humerus, the other large, triangular, situate in the middle of the 

 margin, lunule terminal ; tarsi piceous. Abdomen, black, naked, 

 immaculate. 



Var. o. Labrum black or piceous, anterior marginal spot of the 

 elytra wanting. 



Very distinct from any other species with which I am ac- 

 quainted, for the variety I am indebted to Mr. J. Gilliams, who 

 caught it in the State of Maryland. 



[Not the C. ohscura Fabr., which is the European C. gcr- 

 manica ; it is a black race of C. rugift-ons Dej., and wa.s described 

 as (J. modcsta Dej. — Lec] [419] 



8. C. PURPUREA. — Head, impressed lines of the thorax and 

 margin of the elytra green^ the latter with a central, reclivate, 

 oblique, abbreviated band, terminal line and intermediate dot 

 white. 



C. purpurea, purpurine en-dessus, d'un vert bleuatre cn-des- 

 sous ; elytres avec une band courte, et deux points blancs. Oli- 

 vier, Ins. 33, t. 3, fig. 34. 



C. marginalis f thorace elytrisque eupreis ; marginibus viridi- 

 bus, elytris lunulis duabus albis, Fabr. Syst. Eleut. 1, p. 240. 



Length of the male about three-fifths of an inch. 



Inhabits North America. 



Z>e.sc. Head red-cupreous, hairy with green edges, and two 

 distinct green lines between the eyes, originating at the base of 

 the antennae, and approximating toward,s the vertex ; antennss 

 1818.] 



