Frons longer than wide; antennal club with segment I longer than segment 2, sometimes as long as segments 2 and 3; body stout, usually less than 2.2 times longer than wide, except P. granulatus ......
4
Elytral bases with serrations high, sharp, and prominent, more pronounced at sides; interspace 9 strongly elevated and distinctly serrate; less than 3.5 mm long; parent gallery
longitudinal
. . . .nebulosus (LeConte)
Elytral
bases with low, blunt serrations; interspace 9 not strongly elevated or serrate; more than 3.5 mm long; parent gallery transverse .... ........
3
Color pattern consisting of very light brown and white scales, the white scales not arranged in patches ......dispar dlspar Blackman Color pattern consisting of predominantly black scales with scattered patches of white
scales..
.......disparpullatusBlackman
Larger, up to 5.5 mm long; body more elongate,2.4 times longer than wide; pronotum and frons strongly granulate-punctate; elytral striae about as wide as inter-
spaces.
5.
...granulotus(LeConte)
Smaller, less than 4.6 mm long; body stout, less than 2.2 times longer than wide; frons not strongly granulate-punctate; elytral striae narrower than interspaces . . .
.
5
Pronotal scales of female hairlike, those of male slender; striae wider, interspaces appearing convex; interstrial setae of females shorter than width of interspice . . .
.
6
Pronotal scales of female elongate-oval, those of male broad-oval to nearly circular; elytral striae narrow and interspaces flat; interstrial setae longer than width
ofinterspaceinbothsexes
.........7
of male slender. some nearlv hairlike: elvtral scales of female narrow, hairlike on disk: elytral striae nairo*er than iriterspacesl chiefly from
Pronotal scales
Tsugaspp.
......
tsrgaeSwaine
Pronotal scales of male broad. none hairlike: elvtral striae nearlv as wide as interspaces; chiefly from Abies spp. ........... zoDl'llsSwaine Frons with arcuate imDression not distinct in either sex: frons of male broad (0.510.57 mm); elytral scales of female nearly circular on disk . . . .grazdrs Swaine Frons with arcuate impression deep and distinct in both sexes; frons of male narrower; elytral scales of female longer than wide on disk . 8.
"on':1 "on'
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8
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Pseudohylesinus neDulosus ( LeConte)
Diagnosis. Length 2.3-2.9 mm. Frons as long as wide, surface closely punctured; pronotal vestiture consisting of short, erect, scattered hairlike setae and numerous, finely divided, recumbent scales; crenulations on elytral bases larger and sharper on sides; vestiture on elytra of numerous circular scales l-orming a variegated color pattern; declivity convex! interspaces I and 3 slightly
elevated and weakly serrate.
Hosts. Chiefly Pseudotsuga
menziesii: also Abies spp., Picea spp., and
Tsuga spp. 6'7