WICKHAM: fossil ELATERIDAE of FLORISSANT. 517 



LiMONius SHOSHONis, sp. nov. 

 Plate 5, fig. 10. 



Form fairly elongate. Head finely and rather vaguely punctate. 

 Antennae lacking. Prothorax almost exactly equal in length and 

 breadth, surface finely, not deeply, but fairly closely punctate, apex 

 not much narrower than the base, sides feebly arcuate, front angles 

 nearly rectangular, hind angles carinate, sharp, only a little divergent. 

 Scutellum nearly triangular. Elytra moderately tapering, finely 

 striate, strial punctures a little elongate, quite fine, not very deep and 

 separated from each other in the same row by approximately their 

 own diameters, interstitial spaces flat, wide, scarcely visibly punctu- 

 late, Qnely hairy. Length, from front of head to elytral apex, 7.25 

 mm.; of elytron, 4.35 mm. 



Described from one specimen. 



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

 collected by Professor Cockerell at Station 14, Florissant, Colo., in 

 1906 and bears his number 58. 



The beetle is provisionally placed in Limonius chiefly on account of 

 its form and sculpture. It is smoother than the other Florissant 

 species referred to this genus. 



Limonius volans, sp. nov. 



Plate 5, fig. 11. 



Form rather elongate. Head deeply punctured, closely and rela- 

 tively coarsely on the front, more finely and sparsely on the vertex. 

 Antennae wanting. Prothorax a trifle broader than long, more 

 finely and much more sparsely pvmctured than the head except near 

 the side margins where the sculpture is much coarser and closer than 

 on the disk. Base somewhat broader than the apex, sides very little 

 arcuate, front angles short, hind ones of moderate length and but 

 slightly divergent. Elytra two and three fourths times the prothora- 

 cic length, conjointly rounded at apex, finely striate, the strial punc- 

 tures not very close nor well defined, interstitial spaces flat, with 

 strong, fairly sparse punctures, more pronounced, though probably 

 not larger, than those of the striae. Length, from front of head to 

 elytral apex, 9.00 mm.; of elytron, 5.60 mm. 



