WICKHAM: FOSSIL ELATERIDAE OF FLORISSANT. 521 



plates but slightly dilated externally and without a distinct tooth 

 over the thighs. The beetle differs from P. laevissimus in the 

 proportions of the elytra and prothorax, as well as in some minor 

 details which may be gathered from the descriptions. 



PARANOMUS LAEVISSIMUS, sp. nov. 

 Plate 6, fig. 10. 



Form fairly stout. Head very finely punctulate, a little more 

 coarsely anteriorly. Antennae poorly preserved, slender, scarcely 

 at all serrate. Prothorax almost absolutely smooth, neither side 

 completely preserved but from a combination of the two it is evident 

 that the base and apex were subequal, the width about one third 

 greater than the length, sides arcuate, sinuate in front of the hind 

 angles which are somewhat divergent, acute and carinate, basal 

 margin strongly sinuate each side. Scutellum obscure, apparently 

 oblong. Elytra two and three fifths times the length of the pro- 

 thoracic median line, without sculpture except two lines of faint 

 elongate punctures near the outer edges and some still weaker ones 

 on the disk, no visible hair marks. Underside almost perfectly 

 smooth. Length, from front of head to elytral apex, 8.10 mm.; of 

 elytron, 4.75 mm. 



Described from one specimen, with counterpart. 



Type. In the Museum of the University of Colorado, collected at 

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



Perhaps the most striking characteristic of this beetle is the almost 

 total lack of sculpture. The form is like that of Cardiophorus and 

 the curved prosternal sutures are similar to those found in that genus, 

 but the spine is not truncate nor is the scutellum cordiform. The 

 nature of the prosternal sutures forbids reference to Cryptohypnus, 

 and while the coxal plates are not distinctly shown I think they are 

 gradually smaller externally as in the Corymbitini. The practical 

 lack of elytral striation leads me to refer the insect to Paranomus. 



PARANOMUS HEERI, sp. nov. 

 Plate 6, fig. 8, 9. 



Form only fairly elongate. Head minutely, sparsely punctulate 

 on the vertex, more closely at front and sides. Antennae bent under 



