AMERICAN COLEOPTERA. 263 



l."?. C flrtridaniis, n. sp.— Body beneath black, above green as in sericeu-t, 

 legs pale. Head nearly smooth, labruni emarginate, antennse pale. Thorax 

 much broader than long, very little wider at base than apex, sides regularly 

 arcuate with very feeble trace of sinuation posteriorly, margin very narrowly 

 rufous, disc moderately convex, surface coarsely and moderately densely punc- 

 tured, less densely at middle. Elytra of the form of tricolor, striate, strise dis- 

 tinctly punctured, intervals densely punctulate, and with very short, reddish- 

 brown pubescence. Prosternum margined at tip, coarsely punctured in front, 

 episterna coarsely but rather indistinctly punctured. Metasternal episterna 

 long, sfiirsely punctate. Abdomen as in Tii^e/". Length .48 inch ; 12 mm. 



The sculpture of the elytra is much more distinct than in any of 

 the species of this groiip which follow, but not submuricate as in 

 penai/lvank-us, but very closely resembling that of sericcus. The 

 thora.x has nearly the outline of iinpuncti/nms, but is more convex, 

 and is of nearly the same size, relatively to the elytra. 



The labruni is rather more emarginate than in brevilahris. 



Three specimens, two ? Leconte, one % Ulke, from Florida. 



14. C. brevilabris, Lee— Form and color of pennylvanicus, elytra bluish- 

 black. Head and thorax similarly sculptured. Elytral intervals flat, finely 

 and indistinctly punctured. Body beneath as in the preceding. Length .40 — 

 .48 inch; 10—12 mm. 



Anterior femora of male simple. Labrum feebly emarginate. 



Chaudoir adopts the name quadricollis, Kby., for this species 

 having been misled by a note published by Dr. Leconte, in the 

 Ann. Mag. Nat. Hist., Nov., 1870. This error was subsequently 

 corrected, Proc. Acad., 1873, p. 325. 



This species occurs in Illinois, Texas, Iowa, New Mexico, Colorado. 



15. C. tricolor, Dej. — Similar in form to pensylvanicus, elytra black with 

 very faint tinge of blue. Head green, slightly bronzed, labrum truncate. 

 Thorax narrower at apex than base, broader than long, sides arcuate and 

 feebly sinuate posteriorly, hind angles acute, not prominent; basal impressions 

 fine, moderately deep; surface rather coarsely and densely punctured. Striae 

 of elytra fine but moderately deep, finely punctured, intervals flat, finely, 

 moderately densely, but very indistinctly punctured. Body beneath as in 

 pensi/ioanicus. Length .46 — .52 inch; 11.5 — 13 mm. • 



The color of the head and thorax are apt to vary in this species 

 and from green become cupreous. It is very closely allied to the 

 next species and differs by feeble characters. 



Occurs everywhere east of the Rocky Mountains, from Canada to 

 Texas, and thence through Arizona to San Diego, California. 



Ifi. C neiiioralis. Say. — Closely allied to tricolor, but diff'ers as follows; 

 Head and thorux coppery bronze, (very rarely greenish), the latter always 

 more or less subopaque and more finely punctured, anteriorly more convex, 

 median line distinctly impressed in its entire length. Elytra black without 



