WICKHAM: FOSSIL ELATERIDAE OF FLORISSANT. 515 



Florissant, Colo. With it are associated No. 2,737-2,738 M. C. Z., 

 (No. 7,971 and 10,952 S. H. Scudder Coll.). Most likely No. 2,739- 

 2,746 M. C. Z. (No. 2,870, 8,345, 8,549, 8,753, 12,766, 8,226, 8,842 

 and 11,788 S. H. Scudder Coll.), belong to the same species. There 

 are also three additional specimens in my collection. 



While shorter and broader than most recent species of Limonius, 

 the essential characters, as shown by the coxal plates (which are 

 narrow and but little dilated internally,, only moderately prominent 

 over the insertion of the thighs), the prosternal sutures, (double, 

 little curved), the short prosternal lobe and the blunt scutellum 

 correspond very well with this genus. The basal antennal structure 

 is similar to what we see in the recent L. crotchii of the western United 

 States, but the general aspect is more that of L. nitidulus from the 

 same district. 



LIMONIUS FLORISSANTENSIS, sp. nov. 

 Plate 6, fig. 5-7. 



Form moderately elongate. Head rather finely and extremely 

 closely and deeply but regularly punctured. Antennae about reach- 

 ing the prothoracic base, faintly serrate. Prothorax approximately 

 one seventh broader than long, apex and base subequal, surface quite 

 evenly punctate, about as coarsely as the head but more sparsely, 

 apex nearly truncate, front angles obtuse, sides regularly arcuate to 

 about the middle, which is the broadest part, thence narrowing to 

 near the base, hind angles acute, carinate, but hardly divergent. 

 Scutellum oblong oval. Elytra about two and two thirds times the 

 length of the prothoracic median line, finely, sharply striate, strial 

 punctures fine, somewhat elongate, separated by approximately 

 their own long diameters, interstitial spaces flat, broad, confusedly 

 and sparsely punctate, the punctures of varying sizes, the largest 

 distinctly smaller than those of the striae. Underside punctured 

 throughout, rather coarsely and closely on the prosternum and flanks, 

 more finely on the meso- and metasternal sclerites, the abdomen 

 finely punctate except on the last segment and along the sides, where 

 the sculpture is coarser. Length, 8.40 mm.; of elytron, 5.50 mm. 



Described from two specimens, one with counterpart. 



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

 Florissant, Colo. With it are associated another specimen, with 

 counterpart, in my own collection; two from Station 14 in the Mu- 



