480 TERTIARY INSECTS OF NORTH AMERICA. 



head is rather large at base, tapering with a short, broad snout, not so deep 

 as broad, equal and at the tip broadly rounded, directed downward and for- 

 ward, slightly bent along the front margin ; the antennal scrobes extend 

 from the front edge of the eye nearly to the end of the rostrum, and are 

 broadest next the eye, where they are half as broad as the eye itself, taper- 

 ing regularly throughout and shallow; the eyes are moderately large, 

 broadly oval, transverse or a little oblique, the upper extremity thrown 

 backward and the lower forward. The prothorax is short, only about half 

 as long as deep, not tumid, rather cylindrical, its surface smooth. The elytra 

 are not broader nor higher at their base than the surface of the pronotum, 

 and they are simple and furnished with seven equidistant, equally and not 

 deeply impressed, longitudinal stria 1 , 0.1G""" apart from one another, and the 

 outer ones an equal distance from the adjacent border ; these stripe are pro- 

 vided with slightly longitudinal punctures at regular intervals of about 

 O.l mm , by which the stria 1 are carried to about double their usual depth 

 Some of the specimens have lost the elytra, and on these the posterior edge 

 of the hind coxa? have been impressed through the abdomen, giving the 

 insects the appearance of being furnished with elytra which cover but half 

 of the abdomen. The same thing may be noticed in other species. 



Length of body exclusive of rostrum, 5.7;")""": of rostrum beyond the 

 eye, O.G2 mm ; breadth of same, 0.5"""; depth of same, 0.44""" ; length of eye, 

 36 mm ; width of same, 0.24"""; length of prothorax, 0.72 mm ; height of same, 

 1.3 ram ; length of elytra, 3.05 mm ; width of same, l.2 mm ; length of fore femora, 

 0.72 mm ; width of same, 0.32 n "" ; length of middle femora, 0.8 mm ; width of 

 same, 0.32 mm ; length of hind femora, l.l mm ; width of same, 0.34 mm . 



Green River, Wyoming. Numerous specimens. 



EPICURUS EFFOSSUS. 

 PI. 8, Figs. 7, 35. 



Eiidinynyux effossus Scudil., Bull. U. S. Geol. Geogr. Snrv. Terr., II, 85-86 (.1876). 

 Epicurus effossus Scudci., Bull. U. S. Geol. Geogr. Snrv. Terr., IV, Tti'i (1878). 



Nearly fifty specimens of this species are at hand, all found in Richard- 

 son's shales by Mr. Richardson, Mr. Bowditch, and myself, besides two I 

 found in beds at the same spot, but about thirty meters lower; these were 

 the only Coleoptera found at the latter spot, excepting a single specimen of 

 Otiorhynchus tumb;e Scudil., belonging to the same family. Most of the 



