CURCULIONID.22—CURCULIONIN 23—PRIONOMERINI. 119 
PRIONOMERUS Schonherr. 
To this monotypic genus, founded on a species from the Atlantic States, 
I can now add a single fossil species from Florissant. 
I 
PRIONOMERUS IRVINGI. 
d a 
Pier, Big. 12: 
A large stout-bodied form. The head and prothorax together, as 
viewed above, form a nearly equiangular triangle with rounded sides, the 
head only less heavily punctured than the prothorax where the punctures 
are close and rather coarse; beak moderately stout, gently arcuate, as long 
as the prothorax (not contracted at base as the figure would indicate). Ely- 
tra considerably broader than the base of the prothorax, with rounded 
humeri; they are but little more than half as long again as broad, apically 
divergent so as to expose the pygidium, the strisxe pretty sharp and mod- 
erately deep with not very distinct, distant punctures, the interspaces flat 
with large irregular, distant punctures, approximately disposed in two rows 
in each interspace. 
Length, excluding rostrum, 47°"; rostrum, 1°35"; width of base of 
thorax, 2:3"; of elytra, 3-27". 
Florissant, Colorado. Two specimens, Nos. 8627, 8942. 
This insect is named in honor of Dr. Roland D. Irving, of Wisconsin, 
3) 
my colleague on the U. 8. Geological Survey. 
ripe I YCEINT. 
This small tribe is very similarly represented in the Tertiaries of 
Europe and America. In the former are found one species of Sibynes, at 
Aix; and two of Tychius, at Rott and Brunstatt ; in the latter one of 
Sibynes and two of Tychius, all at Florissant; in no other tribe of Rhyn- 
chophora is there such a close similarity. 
TYCHIUS Germar. 
This genus is numerous in species of small size and is widely spread, 
especially in the-northern hemisphere and inthe Old World. North Americ: 
possesses only seven species, found in the Mississippi valley and westward, 
