464 PROCEEDINGS OF THE NATIONAL MUSEUM VOL, 92 
ing, finely, closely granulate-punctate below and at sides, less finely, 
more deeply punctated above in median third, with interstices smooth ; 
broadly, transversely impressed, sometimes subconcave, with a rather 
broad, elevated median carina bisecting concavity and extending to 
epistomal margin; hairs short and fine. Eye three times as long as 
wide, more than half divided by a U-shaped emargination, Antenna 
with club two-thirds longer than wide, first and second sutures sub- 
transverse, third oblique. 
Pronotum about 1.12 times as wide as long, widest behind; sides on 
posterior two-thirds gradually, arcuately narrowed, rather strongly 
constricted just behind the very broadly rounded anterior margin; 
surface piceous black, shining, distinctly impressed anteriorly be- 
tween lateral constrictions; punctures deep, moderate in size and 
spacing, interstices smooth on disk, subgranulate at sides; median 
line behind slightly elevated, impunctate only near middle of disk; 
lateral calli small, only feebly elevated; vestiture fine and short but 
visible, slightly longer on sides. 
Elytra wider than pronotum, about 1.29 times as long as wide, 
slightly wider behind middle; sides very feebly arcuate on anterior 
two-thirds, rather broadly rounded behind; surface shining; striae 
on disk narrow, deeply impressed, punctures fine and rather indis- 
tinct, striae slightly wider on sides; interspaces on disk wide (slightly 
less so than in dentatus (Say), slightly convex, not so wide and more 
strongly convex on sides, rather coarsely granulate (more coarsely 
and sparsely granulate than in dentatus), with coarser granules be- 
coming uniseriate near declivity; hairs fairly numerous, fine, mod- 
erately short. Declivity with first and third interspaces rather 
strongly convex, each with a row of strong, sharp serrations, those on 
first interspace sparser than on third, densely, finely punctured on 
mesal portion; second interspace shining, unarmed, scarcely narrower 
than third, flat, sparsely, finely punctured; with a few sharp granules 
on the interspaces laterad of third; hairs longer and more conspicuous 
than on disk. Anterior face of mesosternum precipitous, 
Female.—Similar to male, but frons wider between eyes, frontal 
rectangle about 0.63 as long as wide, convex, flattened and impressed 
between eyes, with a fine, weakly elevated median carina; elytral de- 
clivity with first and third interspaces less convex than in male, each 
with a row of sparse, small, sharp serrations; second interspace flat, 
unarmed, slightly narrower than third at apex; pubescence of disk 
and declivity more abundant than in male. 
Phloeosinus canadensis was described from specimens taken from 
Thuja occidentalis L. in Quebec. It occurs throughout eastern Can- 
ada and the northeastern part of the United States from Maine to 
