BARK BEETLES OF THE GENUS HYLASTES 15 
convex on declivity, nearly flat on sides, rugose-granulate on disk, with granules 
becoming larger and uniseriate on declivity ; ninth interspace scarcely elevated ; 
vestiture sparse, fine, inconspicuous, and hairlike on disk and sides, much more 
abundant on declivity, scalelike except for a row of small hairs in middle of 
each interspace. Last sternite of abdomen nearly equal in length to the 
sum of the three preceding ones, convex, broadly rounded behind, moderately 
finely and closely punctured, with rather sparse, fine, short, appressed hairs. 
Male.—Slightly stouter, sculpture similar; last abdominal sternite shorter, 
more broadly rounded behind, with punctures rougher, somewhat larger at 
base and sides, much closer and finer in the median broad impression on the 
posterior half; vestiture at base and sides Sparse, fine, short and appressed, 
much coarser, longer, abundant, and suberect in impression. 
Remarks —This species was described from Colorado, only the 
female being represented in Swaine’s description. The writer has 
carefully studied specimens from Pikes Peak, Colo., and Santa 
Blanca Mountains, N. Mex. The host when recorded is Picea engel- 
mannii Engelm. or “pine.” 
HYLASTES CANADENSIS, new species 
Female.—Reddish brown, 4.4 mm. long, about 2.82 times as long as wide. 
Frons moderately narrow between eyes, frontal rectangle about 1.1 times as 
long as wide, reddish brown with epistomal margin piceous; epistoma moder- 
ately impressed at each side; epistomal margin liplike, median lobe wide and 
short, broadly and deeply impressed in median line, with free end emarginate; 
median carina very fine, feebly elevated, faint but traceable as far as arcuate 
transverse impression, which is weak at sides but moderately developed in 
median area; surface subopaque, finely, very closely punctured, finely granulate 
near eyes at each side; vertex very finely and densely punctured, opaque. Eye 
finely granulate, not quite twice as long aS wide, widest above; inner line 
entire. Antenna with first segment of club longer than other three combined. 
Pronotum slightly narrower than elytra, about 1.13 times as long as wide, 
widest just behind middle; posterior outline weakly arcuate, posterior angles 
slightly rounded, sides almost evenly, moderately strongly arcuate from base 
to broadly rounded anterior margin, very feebly constricted in anterior third; 
surface subopaque, finely reticulate, punctures of moderate size, moderately 
close, often forming small irregular lines of two to five punctures with inter- 
vening partitions narrower and low; smaller and much closer in front, some- 
what smaller and rather weakly asperate at sides; median line rather narrow, 
feebly elevated, Subopaque on posterior three-fifths. 
Elytra wider than pronotum, about 1.81 times as long as wide; sides subpar- 
allel on anterior two-thirds, then gradually, arcuately narrowed to the narrowly 
rounded apex; surface Ssubopaque; striae moderately impressed on disk, more 
strongly on declivity, punctures moderately coarse, close, rather shallow: inter- 
spaces slightly wider than striae, second interspace much wider, moderately 
convex on disk, more strongly convex on declivity, weakly rugose and finely 
punctured on disk, becoming definitely granulate on declivity; ninth interspace 
only slightly elevated behind; vestiture very minute, appearing glabrous on 
disk, more abundant, longer, and coarser on declivity. Last abdominal sternite 
rather narrowly rounded behind; punctures moderate, not close; hairs small, 
appressed. F 
Male.—Similar to female in proportions and sculpture; last abdominal sternite 
slightly shorter, subtruncate behind, with punctures similar to those of female 
on base and sides, broadly impressed behind, more finely, densely punctured, 
and ornamented with much longer, slender hairs. 
Type locality—Aweme, Manitoba. 
Host—Unknown. 
Holotype, allotype, and one paratype.—U. 8. National Museum No. 
54034. 
Holotype, allotype, and one paratype bear the label “A weme, Man., 
Can., V-26-09, T. Criddle, Collector; Geo. M. Greene Collection.” 
