OTIORHYNCHIDA—OPHRYASTINI. 41 
at each extremity, hardly arched, the surface bluntly rugose. Elytra from 
two and one-third to two and one-half times as long as broad, very gently 
arched, descending not at all rapidly behind, the striz shallow, marked by 
not very deep but moderately large circular punctures, their own diameter 
apart, inducing very slight transverse creases beside them, which are gener- 
ally inconspicuous. 
Length, excluding rostrum, 4"; head and rostrum, 11""; height of 
body, 1:4™™. ; 
Roan mountains, western Colorado, from the richest shales at summit 
next head of East Salt creek. Five specimens, Nos. 309, 1002 and 1003, 
1005 and 1006, 1035, and 1056, U.S. Geological Survey; from near the 
same, one specimen, No. 11, U. 8. Geological Survey. 
PHYXELIS Schoénherr. 
Phyxelis is now a monotypic genus, having but asingle species, found 
on the Atlantic slope of the United States. One or more of the four 
species here referred are found in all the principal Tertiary localities of 
the West excepting Florissant. The species placed here in all probability 
belong to two or more different genera, and it is doubtful whether any one 
of them properly belongs in Phyxelis. They are placed here provisionally 
until better specimens may show further details of their structure. The 
last two, at least, seem to belong together. 
Table of the species of Phyxelis. 
Larger forms, exceeding 3°5™" in length: 
Bye small, transverse --.--.-..-.------------------------------ 000: dilapsus. 
Bye large, subcircular...-..--------------+---- +--+ +--+ +--+ reer eeee CXCISSUS. 
Smaller forms, less than 3°5"™ in length ......--..----------------+-+---- evigoratus. 
The fourth species, being insufiiciently known, is omitted from the table. 
PHYXELIS DILAPSUS. 
Pl vin; Fig. 11. 
The single specimen is preserved so as to show a nearly dorsal view. 
It is a stout, pretty well rounded form. The head is extremely short, hardly 
