504 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 



C. cardisce, but seems to be a little more coarsely punctured on the 

 prothorax. It is smaller than the Florissant species C. lithograpkus 

 and C. florissantensls, and much less coarsely punctured than the 

 fossil Horistonotus coloradensis from the same shales. 



CARDIOPHORUS REQUIESCENS, sp. nov. 

 Plate 2, fig. 7, 8. 



Form fairly elongate. Head minutely and closely punctulate. 

 Antennae wanting. Prothorax too badly damaged for description of 

 the form, punctuation sparse and fine. Scutellum cordiform. Elytral 

 striae extremely fine, the punctures shallow, somewhat elongate and, in 

 general, separated by several times their own diameters. Underside 

 nearly smooth, the visible punctures being sparse and small. Length, 

 from front of head to elytral apex, 6.65 mm.; of elytron, 4.15 mm. 



Described from one specimen. 



Type. In the collection of H. F. Wickham. Wilson Ranch, 

 Florissant, Colo. 



This seems to separate easily from the other Florissant fossil 

 Cardiophori by the finer sculpture and especially in the distant strial 

 punctures. The generic reference is plainly indicated by the form 

 of the prosternal spine and of the scutellum. 



CARDIOPHORUS (?) DEPRIVATUS, sp. nov. 

 Plate 2, fig. 9, 10. 



Form stout. Head not visibly punctured. Antennae apparently 

 with the second joint hardly shortened, the third a trifle shorter than 

 the fourth, the following, up to and including the tenth, subequal and 

 only faintly serrate. Prothorax scarcely at all punctulate, about 

 one third wider than long, sides regularly and not strongly arcuate, 

 the angles not prominent. Scutellum a little elongate, pointed at 

 tip but not strictly cordiform. Elytra hardly three and one third 

 times as long as wide, rather strongly tapering, apices conjointly 

 rounding, surface without sculpture. Underside practically smooth 

 throughout, prosternal sutures curved, convex inwards, metacoxal 

 plates suddenly narrowed externally. Length, from front of head 

 to elytral apex, 5.15 mm.; of one elytron, 3.50 mm. 



