REVISION OF THE GENUS PHLOEOSINUS—BLACKMAN 415 
hairs small, short, and rather scanty on anterior disk, becoming 
longer, stouter, and more plentiful posteriorly. Declivity with inter- 
spaces closely punctured, clothed for the most part with short, 
flattened, scalelike, recumbent hairs, with a few semierect setae; 
first and third interspaces strongly convex, serrations of moderate 
size; somewhat coarser and sparser on first than on third; fifth and 
seventh interspaces each with two or three smaller serrations; second 
interspace narrower than on disk, narrower than first or third, nearly 
flat, devoid of serrations, with numerous stout, scalelike hairs. An- 
terior face of mesosternum very steep. 
Female.—Similar to male in general habitus; frons wider between 
eyes, frontal rectangle about 0.67 as long as wide, densely granulate- 
punctate, with a rather low carina extending from epistomal margin 
to arcuate transverse impression; elytral declivity with first and 
third interspaces strongly convex, each with a row of small serra- 
tions, smaller than in male. 
Type locality—Mount Rainier National Park, Wash. 
Additional locality.—¥airfax, Wash. 
Host—Chamaecyparis nootkatensis (Lambert) Sudw. 
Type material—Holotype, allotype, and 76 paratypes, U.S.N.M. 
No. 55398. 
Remarks.—The holotype, allotype, and 60 paratypes were reared 
from small branches of Chamaecyparis nootkatensis taken in Mount 
Rainier National Park by F. P. Keen and W. J. Buckhorn; 16 para- 
types were taken from (@. nootkatensis at Fairfax, Wash., by J. A. 
Beal. 
PHLOEOSINUS ANTENNATUS Swaine 
Phloeosinus antennatus SwAIne, Can. Ent., vol. 56, p. 146, 1924——W. J. CuHAm- 
BERLIN, Bark and timber beetles of North Ameriea, p. 177, 1939. 
Male.—Black, with elytra reddish brown to piceous; 1.6 to 2.0 mm. 
long, about 2.0 times as long as wide. 
Frons black, shining, broad between eyes, frontal rectangle about 
0.77 as long as wide, epistomal lobe rather short; finely granulate- 
punctate at sides and above, central area mederately deeply concave 
(concavity about as narrow but deeper than in hopping), occupying 
only about half of space between eyes, with a strong, sharply elevated 
median carina on lower three-fifths of concavity; vestiture fine, short, 
and inconspicuous. Eye about three times as long as wide, more than 
half divided by a deep, moderately wide emargination. Antenna 
with club twice as long as wide, first suture nearly transverse, second 
suture slightly oblique, third suture strongly oblique. 
Pronotum about 1.17 times as wide as long, widest near middle; 
sides nearly straight and feebly diverging on posterior half, then 
