12 
GEO. H. HORN, M. D. 
except near the front angles, punctures slightly strigose; elytra scarcely wider 
than the thorax, parallel or slightly wider behind 9- humeri rounded; disc 
striate, strite punctured, intervals flat, transversely wrinkled, irregularly triseri- 
ately, subinuricately punctate ; prosterual lobe moderately prominent, the edge 
with distinct bead, a transverse impressed line posteriorly in front of which the 
lobe is densely coarsely punctate, then for a short distance sparsely punctate, 
followed by a coarse, denser punctuation, with finer punctures intermixed; 
metasternum coarsely punctate, closely near middle, more sparsely laterally, the 
intervals finely closely punctate; abdomen closely, finely punctate, with scat- 
tered larger punctures more numerous in front and on the apical segment. 
Length 7.5 — 10 mm. ; .30 — .40 inch. 
In well preserved specimens the pubescence of the upper surface 
is short and inconspicuous; beneath very fine cinereous or fulvous. 
This is the only species of the group with a faint bronze surface, 
consequently less opaque than squalidvs or fmiebris. AVhile closely 
related to the latter the punctuation of its upper surface is less dense, 
the antennae longer, and the punctuation of the under surface more 
intermixed and coarser. 
The name given to this species was previously made use of by 
Eschscholtz, but that being identical with hyperboreus, and the name 
consequently suppressed, there seems to me no great objection to its 
use for the present species. 
Occurs in western Pennsylvania, New York and Canada, White 
Mountains (Austin). 
Group STRIATULUS. 
Prosterual sutures arcuate and convergent behind. Maxillary 
j)alpi not prominent, the last joint elongate triangular. Thorax 
densely punctured and opaque, with, at most, a smooth median line, 
base without incisures, carina of hind angles short. Elytra striate, 
equally at the sides. Legs slender, the tibial spurs small. Form 
depressed. Body winged. 
The only species composing this group resembles a diminutive 
planatm, but differs from that group by the form of the prosterual 
sutures. The peculiar sculpture of the thorax in the choris and 
Melsheimeri groups will prevent its being placed with them, the 
perplexm series is convex, shining and ornate, while the tumescens 
group is convex without ornamentation. 
C. striatulus Lee. — Obloug, subdepressed, piceous black, opaque, finely 
cinereo-pubescent; legs pale, the femora darker; antennae slender, black, feebly 
serrate; head feebly convex, densely rugosely punctate; thorax a little wider 
than long, narrowed in front, sides arcuate, slightly sinuate in front of the hind 
