258 GEO. ir. HORN, m. d. 



with a very few (six to eight), large punctures. Abdomen entirely smooth. 

 Length .60— .72 inch; 15—18 mm. 



The head is entirely brifj;hfc green, thorax with cupreous titrjre, 

 elytra olive jrreen, opaque, extreme marjrin shininir. The third joint 

 of the antennae is longer than the fourth and the palpi distinctly 

 dilated. 



I have seen two specimens of this species, one from Arizona, the 

 other Mexican. The description was made from the former, which is 

 brighter in color than the other. The description therefoic differs 

 slightly from that by Chaudoir. 



2. C, tomeiitosus, (Say) — Color black, shining beneath, subnpnqiie nn I 

 feebly bronzed above. Head nearly smooth, a few punctures over each eye. 

 Palpi elongate triangular, truncate at tip. AntenuEe black, two basal joints 

 pale, third joint longer than the fourth. Thorax gradually wider from apex to 

 base, hind angles rectangular, base as broad as the elytra; disc with feeble 

 basal impressions, densely punctured at sides and base, midille more coarsely 

 punctured and with vaguely defined smooth spaces. Ba^sal line i>f elytra augu- 

 late at humeri, strise moderately deep, punctures rather coarse but not serrate, 

 intervals feebly convex, finely not densely punctulate and pubescent. Pro- 

 sternum margined at tip and longitudinally impressed in front %; episterna 

 with coarse punctures in front. Metasternal episterna coarsely punctured, 

 elongate, margined. Abdomen almost entirely smooth, not pubescent. Length 

 .52— .60 inch; 1.3—15 mm. 



Anterior femora simple in the male. 



Occurs commonly, nearly everywhere east of the Rocky Mountains. 



3. C purpurieollis, Randall. — Color black beneath, dark violet blue 

 above. Form similar to tomentosus but much smaller. Antennae black, basal 

 joint pale; palpi distinctly dilated and truncate at tip. Thorax gradually 

 broader from base to apex, hind angles obtuse; surface coarsely punctured, 

 punctures arranged at the sides, basal impressions and median line, intervening 

 spaces more convex and smoother. Elytra not broader at base than thorax, 

 basal line angulate at humeri, surface with fine strise finely and distantly 

 punctured, intervals with moderately dense, ratlier coarse, simple punctures. 

 Prosternum sparsely punctured in front, episterna sparsely punctured. Meta- 

 sternal episterna elongate, surface cribrate and with marginal impressed line. 

 Abdomen sparsely punctured over the entire surface and sparsely pubescent. 

 Length .36 inch; 9 mm. 



Anterior femora of male simple. Palpi similar in the sexes, the 

 labial slightly more dilated than the maxillary. 



I cannot understand why (chaudoir has compared this species with 

 uiu/iialtis, as they seem to have very little in common. 



Occurs from New York westward to Kansas, but rare. 



4. C alteriiii.tii.s, Horn. 



I have very little to add to the original description. The form is 

 exactly that of 7iii/cr, but the thorax is less arcuate on the sides, the 



