502 bulletin: museum of comparative zoology. 



and only a little divergent. Surface polished, with sparse, fine 

 punctuation and signs of delicate pubescence. Scutelhun cordiform, 

 impunctate. Elytra finel}^ regularly striate, the strial punctures 

 deep but not coarse, rounded or very slightly oblong, ordinarily 

 separated in each stria by about their own diameters or sometimes a 

 little less. Interstitial spaces flat, extremely minutely punctulate 

 and with fine pubescence. Underside almost perfectly smooth. 

 Length, 8.25 mm.; of elytron, 5.25 mm. 



Described from one specimen, with counterpart. 



Type. — In the collection of H. F. Wickliam. Wilson Ranch, 

 Florissant, Colo. With it are associated four others in my collection; 

 two in the collection of the U. S. National Museum; one in the Mu- 

 seum of the University of Colorado, found by Professor Cockerell's 

 party at Station 14; and No. 2,777-2,784 M..C. Z. (No. 4,746, 6,007, 

 7,650, 8,731, 11,174, 11,782, 12,423, 14,329, S. H. Scudder Coll.). 



The generic reference is based on the form of the metacoxal plates, 

 the truncate prosternal spine, the cordiform scutellum and the carini- 

 form mark on the underside of the prothoracic flanks. The sculpture 

 is entirely that of Cardiophorus and the present species is not unlike 

 the common recent North American C. convexus in most of its char- 

 acters. 



Cardiophorus florissantensis, sp. no v. 



Plate 2, fig. 4, 5. 



Form stout. Head minutely, closely punctulate and pubescent. 

 Antenna not complete, but in life evidently not quite reaching the 

 prothoracic basal angles, the articulations too obscure to allow of 

 comparisons of their lengths. Prothorax one fifth broader than long, 

 narrower apicall^', sides regularly arcuate to near the hind angles 

 which are acute and somewhat divergent, base sinuate each side, 

 rather prominent at middle, surface very minutely punctulate and 

 finely, not closely, pubescent. Scutellum cordiform. Elytra finely 

 striate, the striae with rounded or slightly elongate punctures which 

 are separated usually by less than their own diameters, interstitial 

 spaces broad, flat, not. visibly punctured, pubescent. Underside 

 nearly smooth. Length, from front of head to elytral apex, 10.70 mm. ; 

 of elytron, 6.60 mm. 



Described from one specimen, with counterpart. 



Type. — In the Museum of the University of Colorado, collected 



