WICKHAM: FOSSIL ELATERIDAE OF FLORISSANT. 503 



by G. N. Rohwer at Station 13, Florissant, Colo.; with it N are 

 associated a specimen, with counterpart, found by S. A. Rohwer and 

 one found by Mrs. W. P. Cockerell at the same place; five examples 

 in the collection of the U. S. National Museum; and No. 2,771-2,774 

 M. C. Z. (No. 84, 2,094, 12,421, 12,425 S. H. Scudder Coll.). 



Larger than C. lithographus (p. 501), but otherwise similar. I do 

 not think there is any doubt of the specific distinctness of the two. 

 The coxal plates, as shown, look quite different but I am afraid to 

 depend entirely upon these as the edges may become broken and 

 change the apparent form. 



CARDIOPHORUS COCKERELLI, sp. nov. 

 Plate 2, fig. 6. 



Form stout. Head minutely, obscurely punctured, antennae 

 wanting. Prothorax nearly one and one third times as broad as long, 

 not much narrowed anteriorly, sides strongly rounded, hind angles 

 short but prominent, carinate, basal sinuations pronounced, surface 

 rather densely and more strongly and coarsely punctured than the 

 head. Scutellum apparently imperfect, pointed behind. Elytra 

 short, broad, somewhat obtusely conjointly rounded apically, surface 

 striate, the striae moderately deep, their punctures strong, rounded 

 or a little elongate, close-set, separated ordinarily by less than their 

 own diameters, interspaces broad, flat, roughened somewhat but not 

 distinctly punctured. The entire upper surface of the prothorax and 

 elytra shows signs of rather fine pubescence. Length, from front of 

 head to elytral apex, 6.20 mm. ; of elytron, 3.85 mm. 



Described from one specimen. 



Type No. 2,765 M. C. Z. Florissant, Colo. (No. 1,916 S. H. 

 Scudder Coll.). With it are associated No. 2,766-2,767 M. C. Z. (No. 

 6,379, 10,639 S. H. Scudder Coll.); and three specimens, two with 

 counterparts, in the Museum of the University of Colorado, all from 

 Station 14, bearing the numbers 151, 178 and 179, 209 and 258. 

 No. 2,768-2,770 M. C. Z. (No. 7,476, 9,160, 12,041 S. H. Scudder 

 Coll.) probably belong here. 



The underside is not shown in the type, but the specimen No. 2,767 

 M. C. Z. (No. 10,639 S. H. Scudder Coll.), displays it well, exhibiting 

 moderately curved prosternal sutures, truncate spine and nearly 

 smooth surface. This beetle is similar to the recent North American 



