AMERICAN COLEOPTERA. 267 



After a careful study of specimens from Canada, the Western States, 

 Arizona, California and Mexico, I feel the necessity of uniting leiico- 

 scelis and cordicoUis. 



The differences on which Chaudoir relies for separating the species 

 are certainly very evanescent, such as a little more punctuation of the 

 sides of the vertex and thorax. As might be expected, the northern 

 forms are somewhat more rugose than the southern, but the smooth 

 head is by no means constant in the southern forms. The little varia- 

 tion in the form of the thorax is not worth consideration, as there is 

 in nearly every species an equal, and in many, a greater amount than 

 here. From the inquiry I have made, I find that my correspondents 

 separate the two above named almost entirely by the locality label. 

 In reply to a note, Mr. Ulke stated, that were the locality labels 

 removed from his series he would be entirely unable to separate 

 them. 



Chevrolat's name appears to have priority by several years, and I 

 have adopted it. 



From what has been already stated, this species is widely distributed 

 over the United States and Mexico. 



26. C prasinus, Dej.— Body beneath black, legs pale, last ventral and 

 margins of the two f)repeding segments testaceous, legs pale; above bright 

 green as in sericeus. Head behind the eyes rather coarsely punctured, labrum 

 truncate. Thorax broader than long, sides arcuate in front, gradually nar- 

 rowed to base and not sinuate posteriorly, hind angles obtuse, disc coarsely 

 but sparsely punctured, more densely at apex and base. Basal line of elytra 

 arcuate at humeri, striae 6nely punctured, intervals moderately densely and 

 finely punctured and sparsely pubescent. Prosternum margined at tip, coarsely 

 punctured in front, episterna moderately densely and finely punctured. Meta- 

 sternal episterna long, margined, moderately densely punctulate. Abdomen as 

 in solitarlus. Length .68 inch ; 17 ram. 



3Iale with anterior femora subangulate at base. 



Occurs from the Middle States westward to Colorado and to Texas. 



27. C etimatilis, Lee. — Body beneath black, legs pale, above opaque 

 blue similar to leiicoscehs. Head sparsely punctured except at middle of front, 

 labrum truncate, antennae rufous, three basal joints ))aler. Thorax similar in 

 form to leuco-fceiis but longer and less convex, surface opaque with very sparsely 

 placed coarse punctures, hind angles obtusely rectangular. Elytra finely striate, 

 striae finely and distinctly punctured, intervals flat with scarcely any traces 

 of fine punctures and with very little pubescence, basal line angulate. Pro- 

 sternum margined at tip, in front punctured, episterna coarsely but sparsely 

 punctured. Metasternal episterna elongate, margined, moderately densely punc- 

 tured. Abdomen almost entirely devoid of punctures and pubescence as in 

 tomentosus. Length .50 — .58 inch ; 12.5 — 14.5 mm. 



Anterior femora of male simple. 



