WICKHAM: FOSSIL ELATERIDAE OF FLORISSANT. 52k 
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 
