ANTHRIBID.E—TROPIDERINI. 163 
long, slightly enlarged apically, with rather stout mandibles. The prothorax 
is considerably broader than long, at base a little narrower than the elytra, 
tapering forward slightly, the front margin truncSte, the prebasal ridge 
exceedingly slight and straight, the surface roughened. Elytra fully two 
and a half times longer than broad, tapering a little on the apical half, the 
apex subacuminate, the striz very fine and slight, with slight traces of feeble 
punctuation. 
Length, 4:25™"; breadth, 1:8™. 
Green River, Wyoming. One specimen, No. 27, L. A. Lee. 
STIRADERES (6zezpa, dép7), gen. nov. 
An insect is placed in this new generic category which appears by its 
general aspect, moderately short antennz, and entire eyes to belong to 
the group Tropideres. It is mainly to be distinguished for the position of 
the prebasal prothoracic ridge, which is rectilinear and situated so far from 
the base as to be slightly in advance of the middle of the prothorax, a 
character which certainly occurs in none of our genera, and is apparently 
unique. The beak is unfortunately not well preserved, but is apparently 
short, not greatly longer than the large, broad-oval, obliquely longitudinal, 
prominent eyes. The antennz are a little longer than the head and pro- 
thorax together, rather stout, the middle joints not more than twice as long 
as broad, scarcely larger at apex than at base, the three apical joints quad- 
rate or even broader than long, hardly broader than the preceding, the last 
very bluntly rounded at tip, almost truncate. 
A single species is known and comes from Florissant. 
STIRADERES CONRADI. 
Tek i, Deas, (hy. 
too) 
; A single specimen is preserved on a side view. The head, including 
the rostrum, with the prothorax and the sides of the metasterna, are not 
very deeply nor closely punctate (the puncta showing in the specimen, 
which is a reverse, as granulations); antennze, at least on the apical joints, 
much more finely punctate, but with similar sparseness and shallowness; 
Joints of antennze nearly half as broad as the width of the eye, the apical 
