40 TERTIARY RHYNCITOPHOROUS COLEOPTERA. 



marginal stria:' of either side. The interspaces appear to be nearly flat, the 

 strife fine and sliyhtly impressed, and the jjunctures distinct, but slight and 

 exceptionally distant. 



Length, 6-5"™ ; breadth, 2-5 """. 



Lowest shales, White river, western Colorado. One specimen. No. 

 487, U. S. Geological Survey. 



Ophryastites dispertitu.s. 

 PI. IX, Fig. 3. 



A poorly preserved elytron, of" very broad form and overlying in part 

 its mate, represents a stouter V>ut otherwise rather smaller species than the 

 others. The elj^tron is scarcely less than twice as long as broad, tajiering 

 from the middle, but only gradually, until near the tip, where it evidently 

 had an abrupt descent, the apex beiug broadly rounded. There are nine 

 shallow and rather broad stripe, which are filled with rather sharply and 

 somewhat deeply impressed, not very large, circular puncta, separated from 

 one another by al)out their own diameter. 



Length of elytron, 4-5"°'; breadth, 2-5'""'. 



Roan mountains, western Colorado, from the richest beds at the summit 

 of the bluffs at head of East 8alt creek. One specimen, No. 13.^), U. S. 

 Geological Survey. 



EXOMIAS Bedel. 



Tliis is a Euro))ean genus, fairly supplied witli species, of which a 

 le one is also found in the United States, in New 

 a siiiiile fossil from the Roan mountains of Colorado. 



single one is also found in the United States, in New York. To it I refer 



to 



ExOMIAS OBDUREFACTUS. 

 PI. IX, Fig. 4. 



Body subcylindrical; head short; beak half as long as prothorax, or 

 as long as the liead, stout, broadly rounded at tip, front margin rather 

 strongly convex; eyes circular, their diameter half the width of the beak, 

 the facets about ()'()2""" in diameter. Prothorax higher than long, truncate 



