WICKHAM: FOSSIL ELATERIDAE OF FLORISSANT. 499 



gent and but shortly if at all carinate, entire thoracic surface hairy 

 like the head, minutely and sparsely punctured. Elytra not tapering 

 until well behind the middle, striae very fine, their punctures sepa- 

 rated in general by considerably more than their own long diameters, 

 interspaces broad, flat, finely, sparsely punctured, each puncture 

 bearing a hair. Length, from front of head to elytral apex, 5.90 mm.; 

 of elytron, 3.75 mm. 



Described from one specimen. 



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

 lected at Station 14, Florissant, Colo., by S. A. Rohwer. 



The generic reference is made with a good deal of doubt, but the 

 form, sculpture, and vestiture point, in general, to the Eucneminae 

 and the antennae and size are not unlike Deltometopus. 



FORNAX RELICTUS, Sp. nOV. 



Plate 1, fig. 3. 



Outline rather fusiform. Head of moderate size. Antennae not pre- 

 served except the basal, portion of one which is in too poor condition to 

 be described. Prothorax beneath with wide marginal groove, proster- 

 num not very well shown in front, but the lobe was evidently short, 

 sutures grooved and quite broad, probably nearly straight although 

 one of them is thrown out of line by pressure, spine not long, pointed, 

 its margin with a fine but distinct bead. The hind angle, shown on 

 one side only, is well developed, not strongly divergent, front angles 

 not completely preserved, sides, as far as shown, evidently convergent 

 anteriorly and slightly arcuate. Punctuation of the entire under- 

 side obscure, apparently minute, with marks of a covering of fine hairs. 

 Elytra with striato-punctate sculpture showing through. Length, from 

 front of head to abdominal apex, exclusive of sex organ, 6.85 mm. 



Described from one specimen. 



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

 Florissant, Colo. 



In form and size, this beetle is not unlike the fossil Microrhagus 

 vulcanicus, described herein, but has stronger elytral sculpture. 

 The wide marginal prothoracic grooves and the type of the prosternal 

 sutures are much like those of the recent Fornax hornii of our eastern 

 states, which is said to be the female of F. calceatus. In general, the 

 form and size are also similar to that species. 



