AMERICAN COLEOPTERA. 131 



Ii. grandis, Hentz, Trans. Am. Phil. Soc. iii., p. 58; Chaud. Bull. Mosc. 

 1S70, ii., p. 139. 



Our largest species, easily distinguished by the characters of the 

 above table. The head is comparatively smooth, finely wrinkled 

 within the eyes and a few punctures sparsely placed on the front and 

 vertex. The antenna are slender and pale, although the outer joints 

 are darker than the three basal. Thorax nearly twice as wide as long, 

 with median line distinctly impressed, margin broad and surface finely 

 transversely strigose. The elytra are blue and with moderate lustre, 

 the striae deep but not punctured. The body beneath and legs are 

 pale yellowish testaceous, abdomen black, the first segment usually 

 paler. Length .38 inch ; 9.5 mm. 



Occurs in the Gulf States, also Illinois, Nebraska and southward to 

 Texas. 



Ii. atriTentris, Say, Trans. Am. Phil. Soc. ii., p. 13; Dej. Species ii., p. 

 454; Chaud. loc. cit. p. 142. 



Resembles the preceding in miniature, but has the antennae black 

 excepting the three basal joints. The elytra are also finely striate and 

 the intervals flat, the striae are also finely punctured. Length .24 — 

 .28 inch j 6 — 7 mm. 



Occurs everywhere in the United States north of the latitude of 

 Philadelphia and westward to Dacota. 



Ii. tricolor, Say, Trans. Am. Phil. Soc. ii., p. 11; Dej. Spec, ii., p. 453; 

 Chaud. loc. cit. p. 140. 



Closely resembles in general appearance the preceding species, but 

 less elongate and with black head and dark epipleurae. The antennae 

 are similar to those of atriventris. The head is sculptured as in gran- 

 dis, black, with labrum pale ; elytra deeply striate, color decidedly 

 green. Color beneath as in grandis. Length .28 — .34 inch; 7 — 

 8.5 mm. 



Occurs in the Middle States northward to Canada. 

 Ii. majuscula, Chaud. Bull. Mosc. 1870, p. 141. 



This species so closely resembles grandis that it has, until the essay 

 by Chaudoir, been confounded with it. The very feebly emarginate 

 fourth joint of hind tarsus will, however, at once distinguish it. The 

 form and color of the two species are identical except that the present 

 species is perhaps somewhat narrower and less convex ; the color of 

 the elytra is less brilliant and the striae less deep and the intervals 

 more flattened. The thorax of majuscula is more strongly wrinkled 



