Dec, I9I2.] Fall: North American Collops. 261 



C. hirtellus Lee. Ann. Report, Chief Engineers, 1876, p. 517. 



Of medium size, dull to moderately shining. Head black, shining, finely 

 not densely punctate with widely scattered coarser setigerous punctures ; labrum 

 and epistomal margin pale. Antennae d^) feebly serrate, black, the lower half 

 of the basal joint and the excavate face of the second joint, pale. Basal joint 

 as viewed from the front triangular, excavate posteriorly, very distinctly wider 

 at apex than long. In the 5 the basal joint is pale with a median dusky spot, 

 the 2d and 3d joints pale in part. Prothorax entirely black, polished and sub- 

 impunctate medially, duller and subrugose laterally. Elytra closely punctate, not 

 tuberculate, dark blue, rarely greenish. Venter with sides more or less heavily 

 maculate with black. Legs almost entirely black in type, the front and more 

 rarely the middle femora becoming in part pale in some specimens. 



The type series is from Taos Peak — 13,000 ft. — northern New 

 Mexico. I have also seen specimens from Elko, Nevada (Wickham) ; 

 Moscow, Idaho; Pullman, Washington (Mann); and Radisson, Sas- 

 katchewan (Willing). 



Var. lucens, new var. 



A form taken at Coolidge, New Mexico, by Professor Wickham and sent 

 out by him as hirtellus differs from the type series in being more shining, the 

 prothorax with narrow pale lateral and basal margins, pale epistomal margin 

 lobed at middle, front and middle legs pale, the hind legs largely dark in one 

 example and with the femur and base of tibia dark in the other; basal joint 

 of antennae entirely pale and not wider than long. A specimen from Salt Lake, 

 Utah (Horn Coll.), collected by Schwarz (?), has the basal antennal joint Cc?) 

 black superiorly and the thoracic pale margin present around the sides only, 

 thus approaching hirtellus. 



C. discretus, new species. 



Head greenish black, labrum and anterior part of the front pale, the pale 

 margin trilobed posteriorly, the lateral lobes reaching the eyes, the middle lobe 

 broader and a little more produced ; punctuation sparse and very fine, the 

 setigerous punctures scarcely coarser. Antennas {(^) strongly serrate, entirely 

 yellow except for the apices of the outer joints; basal joint not excavate pos- 

 teriorly, oblong as viewed obliquely from the front and above, broadly trian- 

 gular and about as wide as long when viewed from the front and below ; second 

 joint subpentagonal, strongly transverse, appendage moderately long. Prothorax 

 entirely black, polished throughout, punctures very fine and remote, a little 

 closer and subasperate near the side margins. Elytra dark blue, strongly shin- 

 ing, rather finely and not very closely punctate. Body beneath black, the ventral 

 sutures narrowly pale. Legs black, the front tibiae and tarsi pale. Length 4^2 mm. 



Colorado (Troublesome) ; a single 6 in my own collection. 



