REVISION OF THE GENUS PHLOEOSINUS—-BLACKMAN 437 
Type material——Holotype, allotype, and 20 paratypes. U.S.N.M. 
No. 55405. 
Remarks.—The holotype, allotype, and 9 paratypes were taken from 
bark of Thuja plicata at Metaline Falls, Wash., by H. J. Rust; and 
11 paratypes from 7. plicata, Wind River, Wash., by J. E. Patterson. 
PHLOEOSINUS BAUMANNI Hopkins 
Philoeosinus baumanni Horxins, Proc. Ent. Soc. Washington, vol. 7, p. 79, 1905.— 
ScuevL, Anal. Escuela Nac. Cienc. Biol., vol. 1, p. 337, 1940. 
Male.—Piceous to black throughout except antennae and tarsi; 
3.0 to 4.1 mm. long (averaging about 3.75 mm.), about 2.11 times as 
long as wide; allied to cupresst Hopkins and variolatus Bruck. 
Frons very wide between eyes, frontal rectangle about 0.66 as long 
as wide, epistomal lobe very short, surface piceous, shining, strongly, 
densely granulate-punctate, with punctures masked by granules ex- 
cept in median line and above, central area between eyes moderately 
concave, with a moderately strongly elevated median carina on lower 
half; hairs fine, erect, more numerous and somewhat longer than 
usual, inconspicuous except in profile. Eye less than three times as 
long as wide, about half divided by a U-shaped emargination. An- 
tenna with club slightly more than twice as long as wide, sutures 
arcuate and oblique. 
Pronotum about 1.1 times as wide as long, widest near posterior 
angles; sides distinctly arcuate on posterior two-thirds, constricted 
just behind broadly rounded front margin; surface piceous, shining, 
densely, deeply, rather coarsely punctured on disk, more finely in 
front, and more finely, densely, and roughly punctured at sides; 
lateral calli small but usually distinct; surface indefinitely impressed 
at each side of median line on posterior fourth; hairs fine and rather 
conspicuous, longer on an area in front of lateral calli. 
Elytra scarcely wider than pronotum, about 1.39 times as long as 
wide; sides nearly straight and subparallel on anterior three-fourths, 
very broadly rounded behind; surface shining; striae, except the first 
one, rather weakly impressed, with very coarse, rather deep, close 
punctures; interspaces scarcely wider than striae on disk, scarcely 
convex, rather coarsely rugose, punctate-granulate, granules becoming 
somewhat coarser and uniseriate posteriorly on disk and sides; hairs 
not abundant, rather small, short and inconspicuous. Declivity very 
abrupt, serrations coarse, blunt, and dark; first interspace with two 
to four large black serrations at summit of declivity, with apical 
five-sixths broad, nearly flat, shining, roughly, moderately coarsely 
punctured ; second interspace much narrower than first or third, shin- 
ing, with a few punctures; third interspace strongly elevated and 
