26 [February, 



6, obscure viridis, thorace depresso, elytris subtilius 



punctulatis 20. C. chlorophanus Dej. 



{QQ^ "niger, elytris nigro-virescentibus" 21. C. cordicollis Kirhy. 



53, laete viridis, thorace convexiore, elytris valde 



punctatis 22. C. solitarius Say. 



E. AntennEe articulo 3io baud longiore: (thorax prsecipue aequaliter punctatus.) 



a. supra bicolores, thorax sequaliter punctatus ; 



47, thorace aeneo obsoletius punctato, elytris atris 23. C. nemoralis Say. 

 thorace fortius punctato ; 



4 4Y, viridis, elytris vix obscurioribus, fortius punc- 

 tulatis, striis vix punctatis 24. C. pensylvanicus Say, 



42 B, cupreo-aeneus, thorace antrorsum fortius an- 

 gustato, elytris atro-cyaneis, obsolete punc- 

 tulatis, striis punctatis 25. C. tricolor DeJ. 



45, viridis, thorace antrorsum parum angustato, ely- 

 tris atro-cyaneis, obsolete punctulatis, striis 

 fortiter punctatis 26. C. brevilabris Lee. 



45, viridis, elytris paulo obscurioribus, subtiliter 



punctulatis, tenuiter striatis 27. C. Nebraskensis Lee. 



44 ^54, thorace vage punctato, viridis, elytris ob- 

 scurioribus 28. C. glaucus Lee. 



b. supra concolores, thorace ante basin latiore ; 



46, cyaneus, thorace jequaliter obsolete punctato, 



postice baud angustato, 29.C.vaferZec.Proc. 6, 66 



43, ffineo-ater, thorace inrequaliter punctato, trans- 

 verso, postice angustato, elytris fortius 

 punctulatis, (pedibus vel rufis vel nigris) 30. C. asperulus Men. 



37, seneo-ater, cyanescens thorace infequaliter fere 

 obsolete punctato, hand transverso, postice 

 angustato, elytris minus conspicue punctu- 

 latis (pedibus rufis) 31. C. obsoletus Lee. 



45, viridis, thorace insequaliter fortius punctato, 



lateribus rotundato, 32.C.circumcinctus5ff/. 



5, totus aineo-ater, thorace quadrato, rugose, ad basin 

 utrinque densius punctato, elytris fortius 

 punctulatis 33. C. harpalinus Esch. 



55 65, ovalis, obscure feneus, thorace antrorsum 

 angustato, dense subtiliter punctato, capite 

 viridi 34. C. impunctifrons Say. 



5, ovalis totus niger, thorace antrorsum angustato, 

 grosse injequaliter punctato, profunde im- 



presso, elytris valde punctulatis 35. C. niger Randall. 



c. pedes et corpus concoloria, thorace ad basin latiore ; 



37, fere ellipticus, supra cyanescens, thorace in- 

 sequaliter punctato, elytris subtiliter striatis 

 densissime punctulatis 36. C. purpuricollis Rand. 



fere elliptici fusco-senei, thorace ajqualiter fortius punctato, callo 

 elongato utrinque discoidali notato, elytrorum striis antice 

 grosse punctatis. 

 55, thorace lateribus parum rotundatis 37. C. tomentosus Z>cy. 



67, thorace lateribus antice valde rotundatis 38. C. ampins Lee. 



Doubiful speeies. 

 C. impunctifrons II Kirby, Fauna Bor. Am. 4, 21. Perhaps C. brevi- 

 labris , but the description is very indefinite. 



