WICKHAM: FOSSIL ELATERIDAE OF FLORISSANT. 525 



gate punctures separated in the series by something more or less than 

 their own diameters. Underside showing that the prosternum is 

 strongly, closely and rather coarsely punctured around the anterior 

 portion of the lobe, nearly smooth at middle, side pieces vaguely 

 punctate, abdomen thinly pubescent, the punctuation fine, shallow 

 and sparse. Legs poorly preserved, of moderate size. Length, from 

 front of head to abdominal apex, 13.50 mm.; of elytron, 9.45 mm.; 

 of pro thorax, along median line, 2.45 mm. ; width of pro thorax across 

 base, just in front of hind angles, 3.35 mm. 



Described from one specimen, with counterpart. 



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

 lected by G. N. Rohwer, at Station 14, Florissant, Colo. 



Easily distinguished from the other Florissant fossil Corymbites 

 by the short prothorax and widely divergent hind angles which give 

 the appearance of the recent C. appressus from the northern United 

 States and Canada. That species, however, has the prosternum and 

 elytra differently sculptured. The prosternal, coxal, and antennal 

 characters of the fossil all agree well with the genus in which it is 

 placed. 



CORYMBITES RESTRUCTUS, sp. nov. 

 Plate 7, fig. 4. 



Form fairly elongate, tapering to the ends as in the recent C. hiero- 

 glyphicus. Since the specimen is exposed in ventral view, no de- 

 scription of the upper surface can be given. Head poorly preserved, 

 antennae not shown. Prothorax rather closely and fairly coarsely 

 punctured beneath, more deeply and strongly on the prosternum, 

 spine margined at sides, lobe much rounded, hind angles long and 

 acute, slightly diverging. Metasternal and abdominal punctuation 

 much shallower and more vague than that of the prothorax. Hind 

 leg moderately long, the first tarsal joint not much lengthened, the 

 fourth and fifth obscured. Elytra pointed at apex, sides rather 

 strongly rounding. Length, from front of head to abdominal apex, 

 but without extruded sex organ, 16.30 mm. 



Described from one specimen. 



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

 lected by Mrs. W. P. Cockerell at Station 14, Florissant, Colo. 



Undoubtedly a Corymbites and easily distinguished from C. primi- 

 timis or C. granulicollis by its smaller size and more fusiform outline. 



