WICKHAM: fossil ELATERIDAE of FLORISSANT. 505 



Described from one specimen with its counterpart. 



Type. — In the Museum of the University of Colorado. It was col- 

 lected at Station 13, Florissant, Colo., by Professor Cockerell's 

 expedition of 1906. The obverse bears his number 99, the reverse, 

 127. 



Unfortunately the prosternal spine is damaged so that its form is 

 not shown and while the beetle is perhaps not a true Cardiophorus, 

 because of the form of the scutellum, it seems best to place it pro- 

 visionally in that genus on account of its general similarity to some 

 of the recent species with faint sculpture. 



HORISTONOTUS COLORADENSIS, Sp. nov. 



Plate 2, fig. 11, 12. 



Form fairly stout. As the specimen shows from the underside, the 

 sculpture of the head is not visible. Prothorax, beneath, with the 

 flanks and prosternum distinctly but rather finely and only moder- 

 ately closely punctate, the punctures ordinarily separated by their 

 own diameters or a little less, not very regularly spaced. Meta- 

 sternum a little more finely punctured. Abdomen punctured in 

 general, like the prothorax, the proximal segments somewhat more 

 finely and sparsely than the distal, the terminal one with the punc- 

 tures crowded laterally. Scutellum not visible. Elytra displayed 

 in reverse, the punctuation showing through. It is arranged in 

 striae, the punctures coarse, rounded, deep, mostly separated by less 

 than their own diameters, those near the elytral apices nearly touching. 

 Length, 6.60 mm.; of elytron, 4.10 mm. 



Described from one specimen. 



Type. — In the collection of H. F. Wickliam. Florissant, Colo. 

 Possibly No. 2,763-2,764 M. C. Z. (No. 815, 6,384 S. H. Scudder 

 Coll.) may also belong here. 



In this case, the generic reference is not made with much confidence. 

 However, the size, the truncate prosternal spine and the form of the 

 coxal plates point to the Cardiophori. The punctuation of the 

 underside is coarser than usual in Cardiophorus but is quite similar in 

 disposition to that of the recent Horistonotus simplex from the south- 

 western United States. 



