CARABID.E. 19 



(15) 1. Calosoma (Chrysostigma) calidum. (Fabicius.) Calid C. Chrysostigma. 



Calosoma calidum. Fab. Syst. Eleuth. i, 211, 1. De J. Cotfopt. ii, 197. 5. 

 Carabus calidus. Fab. Syst. Ent. i, 37, 8. Oliv. Ins. iii, 35, 30, 2G, t. iv, / 45. 



Length of the body 9 lines. 



This species is very common in all parts of North America ; several specimens 

 were taken in the Expedition. 



DESCRIPTION. 



Body short, underneath very black, glossy. Head thickly and confluently punctured and wrin- 

 kled ; frontal impressions short and large ; mandibles obliquely wrinkled : prothorax transverse, very 

 short, thickly and confluently punctured ; dorsal channel slight and abbreviated ; lateral margin 

 reflexed particularly at the posterior angles : elytra with fifteen elevated obtuse ridges intersected by 

 innumerable transverse impressed lines ; on the fourth, eighth, and twelfth ridges, which are wider 

 than the others, are from nine to eleven punctiform impressions coated, as it were, with brilliant gold 

 leaf, often of the ruddy hue of copper; one or two also are usually to be seen at the base of the 

 sutural ridge ; in some specimens one on one side, and two on the other, in others two and three : 

 the body underneath is thickly and confluently punctured on each side. 



(16) 2. * Calosoma (Chrysostigma) frigidum. Frigid C. Chrysostigma. 



C- (frigidum) nigrum, subtus lateribus obscure virescentibus ; etytris striatis : striis punclatis, interstitiis elevatis transverse 

 lineatis,foveolisque bilobis triplici serie ; margine virescenti; prothoracis angulis posticis deftexis. 



Frigid Calosoma, black underneath with greenish sides ; elytra furrowed with the furrows punctured ; interstices of the 

 furrows elevated with transverse lines impressed, and a triple series of bilobed obscurely gilded punctiform 

 impressions; margin greenish ; posterior angles of the prothorax depressed. 



Length of the body 9y lines. 



Taken in Drummond's Island, Canada, by Dr. Bigsby. 



DESCRIPTION. 



Not unlike C. calidum, but longer in proportion and more depressed. Body black, not glossy 

 above. Head confluently punctured and wrinkled : mandibles obliquely but less densely wrinkled, 

 and frontal impressions longer than in C. calidum : prothorax scarcely wider than the head, pos- 

 terior angles bent downwards : elytra scarcely at all bronzed, lateral margin, obscurely green, with 

 the same number of elevated lines as in C. calidum, but in the furrows formed by them is a series 

 of punctures, and the transverse lines are less conspicuous ; there is a triple series of punctiform 

 impressions, but they are bilobed, smaller, and the gilding is greenish and less conspicuous ; they 

 are also less numerous, there being only seven or eight in the series next the suture, eight or nine 

 in the intermediate one, and three only towards the apex in the external one : at the base there is 

 also a pair on each side : the sides of the body underneath are greenish, punctured and wrinkled. 



D 2 



