90 TERTIARY RUYNCHOPHOROUS COLEOPTERA. 
PACHYLOBIUS DELETICIUS. 
Plex, Pig, 14 
The beak in the only specimen known is broken, but what remains 
shows that it is at least nearly as long as the pronotum, equal, moderately 
stout, as broad as the longer axis of the eye, and gently arcuate. Prothorax 
rather finely punctuate. Elytra about two and a third times longer than 
broad, subequal, the humeral angle broadly rounded off, the apex rounded 
subacuminate, with nine series of deeply and sharply impressed but rather 
small circular punctures, excepting the eighth series barely channeled be- 
tween the puncta to form a stria, the eighth and ninth series approximate, 
the puncta of any given row separated by about their own diameter, nearly 
or quite as deeply impressed next the apex as at the base. 
Length of elytron, 3°83"; breadth, 1:6". 
White river, Utah, from the very highest beds on the northern buttes, 
next the Colorado lme. One specimen, No. 709, U. 5. Geological Survey. 
PACHYLOBIUS COMPRESSUS. 
jeiRo es remel: 
The somewhat abundant remains consist of elytra only, and usually of 
single elytra. They have the same proportion as in the preceding species, 
but are one-half larger, distinctly though slightly arcuate, tapering from 
the middle by the considerable curve of the outer margin, the apex subacu- 
minate, the humeral angle rather prominent but rounded. There are eight 
series of delicately and rather slightly punctured, slender, and sharply im- 
pressed strive (the punctures and finally the middle striae fading next the 
apex), besides a ninth impunctured marginal stria. : 
Length of elytron, 55 — 62™, average, 5°6™; breadth, 2°2 —-25™™, 
average, 2°-4™™. a 
Roan mountains, western Colorado, from the richest beds at crest of 
bluff overlooking the head waters of East Salt creek. Nine specimens, Nos. 
138, 166, 197, 268, 280, 948, 1040, 1049, 1052, U. S. Geological Survey. 
From near the same beds in the same locality. One specimen, No. 63, 
U.S. Geological Survey. Green River, Wyoming, from the bluffs behind 
the town. One specimen, No. 998, U. 8. Geological Survey. 
