136 Journal Nkw York Ext. Soc. [Vol. ii. 



7\ir. Brevoorti Lcc — Has the base of the elytra deeply striate; 

 intervals at siiles and apex broken into grannies and tubercles. 



lldl'itat, Hiulson's Bay regicMi to Northern Virginia. 



The sculpture of the elytra of this soecies, is subject to con- 

 siderable variation, from striate to tuberculate. 



C. stenostomus /Tr/-. (Plate III, Fig. 2.) — Violaceous; basal 

 impressions of thora.x linear, with only a few distant punctures; 

 elytra deeply striate, with closely placed punctures ; intervals entire 

 on disc, sometimes intermixed in the apical region. Length, .48 

 — .60 inch. = 12 — 15 mm. 



7\rr. Lecontei D,/. — Intervals intermitted from the middle to 

 the ape.\ and assuming the form of tubercles. 



vtir. bicarinatus Ltw — Intervals interrupted, e.xcept at basal 

 region ; intervals four and eight elevated, the twelfth forming an 

 elongate carina. 



Habitat, N. E. America. 



C. canadensis cy/f^z/r/.-- Violaceous, margin blue; somewhat 

 elongate; hintl angles of thorax distinct, basal tranverse impress- 

 ions feel)le or absent, longitudinal impressions sharply defined, 

 with a few punctures; elytra deeply striate, punctured ; intervals 

 conve.x, broken at sides and apex. Length, .44 — .48 inch. = 11 — 

 12 mm. 



■ Habitat, Canada to Maryland ; not found near N. Y. City. 



C. elevatus Fabr. (Plate III, Fig. 3.) — Violaceous or cupreous; 

 thorax with margins considerably elevated, hind angles prolonged 

 over the elytra, finely punctured, disc sometimes wrinkled ; elytra 

 broadly oval, margins reflexed gradually narrowing towards the 

 apex, surface striate finely punctured, intervals convex. Length, 

 .60 — 1. 12 inch. - 15 — 28 mm. 



var. unicolor Fabr . — This form is blackish instead of viola- 

 ceous. 



var. heros llarr. — More robust and much larger than the 

 typical c/cratiis. 



Habitat, Middle States to Colorado. 



C. viduus Z>ey. (Plate III, Fig. 4.) — Violaceous ; thorax much 

 narrower than the elytra, as long as wide; arcuate in front oblique 

 behind, margins moderately wide, reflexed, disc nearly smooth, at 



