38 TERTIARY RHYNCHOPHOROUS COLEOPTERA. 
are separated from 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 
which they are placed. 
Length of elytron, 10"; greatest width, 45™". 
Roan mountains, at summit of bluffs at head of East Salt creek, 
western Colorado. One specimen, No. 102, U. 8. 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 figuring, 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, with 
small, not very deeply impressed punctures; the interspaces elevated, but 
more or less flattened. The hinder part is broken off, but its full length is 
estimated to have been about 155™"; the fragment is 13°5™” long and 
65™™ high. 
The very 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 species 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. ‘They all show a more or 
less vaulted form, though often obscured by pressure, and nine series of 
punctured striz, 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 bordering either margin. Four species are found in the 
western Tertiaries, at Florissant, the Roan mountains, and White river, 
Colorado. 
