THe PsELAPHID2 OF NorTH AMERICA. 43 
ing together. Prothorax one-third longer than the head, 
widest two-fifths from the base, where it is slightly wider 
than long, evenly and continuously arcuate to the base, and 
convergent and slightly arcuate toward the neck, which latter 
is half as wide, and the base four-fifths as wide as the width 
of the prothorax; sides minutely crenate posteriorly; disk 
very convex, imperceptibly and sparsely punctulate, with a nar- 
row, linear, median sulcus, extending from the neck to the 
base, crossed by a similar, straight, linear, transverse sulcus, 
ending each side in a small, pubescent, fovea. lytra from 
side to side very convex, longitudinally nearly stratght; across 
the shoulders they are as wide as the prothorax, and equal to 
the length of the suture; across the tip they are one-fifth 
wider; shoulders rather prominent, sides nearly straight; sutu- 
ral lines slightly arcuate, interval punctulate, base trifoveate, 
the two outer foveze with shallow longitudinal impressions in 
the place of the discal lines, of which the outer ones are one- 
half longer than the inner ones, and may be traced to two- 
thirds of the elytral length from the base. Aéddomen very con- 
vex, the segments sub-equal, border narrow, flat, the basal 
dorsal with two carinz including less than one-fourth of the 
total width. Legs long, slender, tarsal claw with a fine hair- 
like appendage; anterior coxz conical, pointed, posterior coxe 
flat, transversely oval. Besides the transverse oval impression 
on the last ventral in the 4, the acute tubercle of the frontal 
margin is prolonged backward so as to interrupt the trans- 
verse sulcus. 
Habitat. East of the Mississippi River. 
Oropus, Casey. 
O. striatus, Lec. (TZrichonyx striatus Lec.) Yellowish 
brown, uniformly colored; pubescence moderately dense and 
long, abundant; body sparsely punctulate. Length 2 mm. 
Plate XI, Fig. 102. 
Head wider for one-half its length, eyes not prominent, 
large, not as long as the tempora, which latter are but slight- 
