REVISION OF THE GENUS PHLOEOSINUS—BLACKMAN 435 
rower than first and third, nearly flat, finely, very sparsely punctured, 
devoid of serrations; third interspace elevated, moderately finely, 
regularly serrate, finely punctured; fifth, seventh, and ninth inter- 
spaces convex, each with a few small serrations; entire declivity mod- 
erately sparsely clothed with fine, short hairs, with a few slightly 
longer, erect setae from bases of serrations. Anterior face of mesoster- 
num oblique. 
Female.—Similar to male in habitus, with frons wider and shorter, 
frontal rectangle about 0.73 as long as wide, convex, rather coarsely 
granulate-punctate, with a broad, strongly elevated median carina 
on lower half; declivity similar to that of male with serrations no 
smaller than in male, punctures somewhat more numerous, vestiture 
consisting of short, moderately stout hairs (more numerous than in 
male), many of them scalelike, and of the usual small number of 
longer slender hairs from the serrations. 
This species is most readily distinguished from punctatus and ru- 
bicundulus by the more rugged sculpture of the discal interspaces 
of the elytra, the more abundant and conspicuous discal vestiture, and 
by the vestiture of the elytral declivity which is notably better de- 
veloped than in punctatus and in the females is less scalelike and much 
less abundant than in rubieundulus. 
Type locality—Metaline Falls, Wash. 
Additional localities—Northport, Wash.; Pierce and Kootenai, 
Idaho. 
Host.—T huja plicata D. Don. 
Type material—Type, allotype, and 29 paratypes, U.S.N.M. No. 
55404. 
Remarks.—The holotype, allotype, and 5 paratypes were taken 
from Thuja plicata near Metaline Falls, Kaniksu National Forest, 
Wash., by D. DeLeon; 18 paratypes from the same host at North- 
port, Wash., by F. P. Keen; and 6 paratypes from the same host at 
Pierce, Idaho, by J. C. Evenden. Other specimens are from Glacier 
National Park and other localities in northern Montana. 
PHLOEOSINUS RUSTI, new species 
Male.—Piceous brown to black, with elytra reddish brown; 2.23 to 
3.0 mm. long, holotype 2.45 mm. long, nearly exactly twice as long as 
wide, allied to punctatus LeConte. 
Frons very wide between eyes, frontal rectangle about 0.69 as long 
as wide; epistomal lobe very short; surface piceous black, shining, 
finely and densely granulate-punctate at sides, somewhat more 
coarsely, less closely punctate and scarcely granulate above; central 
half moderately concave, with concavity much shallower than in 
