226 



C. arcticus, Walk., Cat. Dermap. Salt., IV, 681. 



Female. — Tavviiy, slender, testaceous beneath. Head and pronotum 

 with a broad, black stripe on each side. Head short, smooth ; tip of the 

 vertex depressed, sub-elliptical ; front punctured, with four distinct keels ; 

 inner keels parallel ; outer keels diverging toward the face. Eyes sub-ellip- 

 tical, much rounded on the hind side. Pronotum short, very finely scabrous, 

 the stripe on each side extending to the fourth* transverse line ; disk flat, with 

 three slight keels ; transverse-impressed lines well defined ; fore border 

 nearly straight ; sides slightly rounded ; hind border much rounded. Pro- 

 sternal spine conical, rather long, much broader than thick. Hind femora as 

 long as the abdomen ; hind tibia3 rather shorter than the hind femora, their 

 spines tipped with black. Elytra and wings cinereous, nearly as long as the 

 body. Elytra with tawny veins. Wings with black veins. 



Length of body, 0.87 inch; expansion of elytra, 1.67 inches. 



Arctic America (Walker). 



C. selectus, Walk., Cat. Dermap. Salt., IV, 682. 



Female. — Tawny, slender. Head and pronotum with a blackish stripe 

 on each side. Head smooth, slightly elongate ; vertex with a broad, blackish 

 stripe; tip depressed, elliptical; front with four keels, which are less distinct 

 toward the face ; iimer keels nearly parallel ; outer keels diverging slightly. 

 Eyes sul:)-elliptical, much rounded on the hind side. Antennas slender, pice- 

 ous toward the tips. Pronotum very finely scabrous ; disk flat, with three 

 distinct keels ; transverse lines well defined ; stripe on each side limited by 

 the fourth line ; fore border nearly straight ; sides slightly rounded ; hind 

 border slightly elongated, hardly angular. Prosternal spine stout, elongate- 

 conical, rather long. Hind femora a little longer than the abdomen, partly 

 tinged with green on the outer side, with three blackish patches above, 

 bright-red beneath ; hind tibiaj glaucous-green, a little shorter than the hind 

 femora, their spines black toward the tips. Elytra pale-cinereous, a little 

 shorter than the body, with a row of black dots in the disk, and with a broad, 

 interrupted, piceous stripe along the costa. Wings with black veins. 



Length of body, 0.84 inch ; expansion of elytra, 1.67 inches. 



Oajaca (Walker). 



* Walker counts the transverse incision, which is near the front margin, as one ; 

 but t':iis is usually, when present, called the submarginal incision or sulcus. 



J 



