38 TERTIAEY KHYNCHOPHOROUS COLEOPTERA. 



are separated fr^m each other in the same series by slightly more than 

 their own diameter, and this is a little greater than that of the stria in 

 Avliich they are placed. 



Length of elytron, 10"""; greatest width, 4-5'"'". 



Roan mountains, at summit of bluffs at head of East Salt creek, 

 western Colorado. One specimen, No. 102, U. S. Geological Survey. 



Ophryastes? sp. 



A large, stout, short-snouted, but very imperfect specimen seems to be 

 nearly related to this genus. It is too fragmentary and imperfect to be 

 worth figiiring, and need only be mentioned as perhaps the largest beetle 

 discovered on the White river. It is fully as large as our largest species of 

 Ophryastes. The rostrum is hardly longer than broad; the thorax tumid 

 and longitudinally coarsely and heavily ridged; the elytra striate, witli 

 small, not very deeply impressed punctures; the interspaces elevated, Ijut 

 more or less flattened. The hinder part is broken off, but its full length is 

 estimated to have lieen about 15'5'°'"; the fragment is IS'.^™"' long and 

 G-S""' high. 



The veiy highest beds on the summit of the buttes on the right bank, 

 of the White river, Utah, next the Colorado boundary. No. 920, U. S. 

 Geological Survey. 



OPHRYASTITES, gen. nov. 



Under this generic name I propose to group such s^jecies as are 

 insufficiently represented, by elytra which can not be referred to other 

 known fossil species, but which agree closely, so far as can be told by these 

 elytra, with the same parts in other Ophryastini. ^Ihey all show a more or 

 less vaulted form, though often obscured by ])ressure, and nine series of 

 punctured stri;e, those of opposite sides of the elytron meeting near the 

 apex, to a greater or less degree, and sometimes accompanied by an im- 

 pressed line Ijordering either margin. Four species are found in the 

 western Tertiaries, at Florissant, the Roan mountains, and White river, 

 Colorado. 



