140 JouRNAi- New York Ent. Soc. [Vol. ii. 



C. vinctus //V/'. (Plate III, Fig. 7.) — Bronze; thorax 

 with a greenish tinge at borders ; elytra distintly catenate, with 

 the intervals forming four elevated ridges. Length, i. to 1.20 

 inch. = 25 — 30 mm. 



Habitat, N. E. America. 



Calosoma \]'cb. 



Closely allied to Carahiis, but the third joint of the antennre 

 compressed instead of cylindrical. 



Synopsis of species. 



Elj'tra witli three rows of golden or metallic green impressed spots. 



lilack'; anterior larsi of male with four joints hairy beneath; strix^ 



and intervals line frigidum. 



Black; anterior larsi of male with two joints hairy beneatli; strire and 



intervals coarse; metallic spots moie niunerons . Say I. 



ISlack; spots golden; anterior tarsi of male with three joints liairy 



beneath calidum. 



Elytra without rows of metallic spots. 



IJlack, elongate, elytra with blue border .... externum. 



Metallic gieen with red margin; large size .... scrutator. 



Metallic green with red border; small size ..... Wilcoxi. 



C. frigidum Kby. — Black above ; greenish-black below; elytra 

 and thor,i.\ with narrow green margins, the former with fine striae, 

 ])iin(:tured and with three rows of small green, impressed spots, 

 thorax and head rugosely punctate. Length, .80 inch. = 20 mm. 



Habitat, Northern States and Canada. 



C. Sayi DeJ. — Larger and more elongate than the preceding 

 species with the striic and punctures much coarser and the intervals 

 broader and more convex. The green impressed spots are more 

 numerous in each row and are larger and more distinct. The 

 thorax is also less punctured. Length, i. inch. = 25 mm. 



C. externum .S;?!', (riatelll, Fig. S.) — Body elongate, sides 

 of elytra slightly convex, almost parallel. Thorax and elytra with 

 violet margin, the latter striate with distinct punctures, intervals 

 convex ; thorax with sides rounded, hitid angles obtusely rounded- 

 Length, 1.20 inch. = 30 mm. 



Habitat, N. E. America, southward and westward. 



C. scrutator Fabr. (Plate Til, Fig. 9.) — Large and robust; 

 thorax very short and broad, sides and hind angle well rounded, 



