BARK BEETLES OF THE GENUS HYLASTES 9 
Last sternite moderately convex, rather narrowly rounded behind, rather closely, 
Shallowly, moderately finely punctured, with fine, short, appressed hairs. 
Male.—Similar in sculpture but slightly stouter, about 2.7 times as long 
as wide; last abdominal sternite shorter, more broadly rounded behind, slightly 
flattened in median area but not grooved; pubescence not especially developed, 
only slightly longer than in female. 
Remarks.—The writer has studied 31 specimens from London Hill, 
Kokanee Mountain, and Kaslo, British Columbia; Easton and Buck- 
eye, Wash., Hood River, Oreg., and Columbia Falls and Kalispell, 
Mont. None were taken from the host tree. Swaine’s type series 
were taken from Douglas fir at Golden and Creighton Valley, British 
Columbia. 
The specimens show little variation as compared with other species 
of the genus. The specimens studied agree very closely with the 
description except that the elytral striae are not “very narrow” and 
the strial punctures are not “small” but moderately coarse. 
HYLASTES SUBOPACUS, new species 
Male.—Piceous brown, almost black, subopaque to feebly shining, 4.6 mm. 
long, about 2.78 times as long as wide; allied to nigrinus. 
Frons moderately broad between eyes, frontal rectangle about 1.14 times 
as long as wide; nearly black except epistoma, which is reddish brown, with 
epistomal margin piceous, liplike, with epistomal lobe broad and short, broadly 
emarginate in middle; epistoma deeply and broadly impressed at each side, 
divided by the median carina, which is moderately elevated below, becoming 
feebly elevated above and ending in the arcuate transverse impression, which 
is very weak at sides but distinctly and broadly impressed in median area; 
rather finely, densely punctured, not granulate except at sides of disk near 
eyes; hairs fine and short, longer, more conspicuous, and directed downward on 
epistoma. Eye about twice as long as wide, notably wider above, inner margin 
entire. Antenna with first segment of club nearly equal to others combined. 
Pronotum narrower than elytra, 1.1 times as long as wide, widest at middle; 
posterior outline feebly arcuate; posterior angles rounded; sides evenly, rather 
strongly arcuate, not appreciably constricted anteriorly, broadly rounded in 
front; surface subopaque, with rather fine, close, shallow punctures, much 
smaller and shallower than in nigrinus; surface of interspaces finely reticulate; 
punctures much finer and denser in front and at sides, finely granulate at 
sides; median line on posterior two-thirds feebly elevated, impunctate; hairs 
on disk fine and very short, scarcely extending beyond rim of puncture, slightly 
longer at sides and much larger near posterior border. 
Elytra slightly wider than pronotum, about 1.8 times as long as wide; sides 
nearly straight and subparallel on anterior three-fourths, then gradually nar- 
rowed but with the apex very broadly rounded; striae strongly impressed, with 
punctures close, moderately coarse, and deep, smaller on declivity; interspaces 
wider than striae, convex, densely granulate-punctate, with slightly coarser 
granules, usually uniseriate but sometimes slightly irregular on declivital inter- 
spaces; ninth interspace moderately convex behind, not so strongly as in 
nigrinus; pubescence of short, fine hairs on disk, more abundant and mostly 
sealelike on declivity, more abundant than in nigrinus. 
Last abdominal sternite broadly rounded, subtruneate behind, rather roughly, 
moderately finely, and closely punctured, with short, fine hairs; posterior 
median area impressed, more finely and closely punctured, with abundant, finer, 
and much longer, yellowish hairs. 
Type locality —Capitan Mountains, N. Mex. 
Additional localities —Brighton, Utah; Colorado. 
Host.— Unknown. 
Holotype and three paratypes—vU. S. National Museum No. 54032. 
Remarks.—The holotype and one paratype were collected in the 
Capitan Mountains, N. Mex., July 17, 1907, by J. L. Webb; one 
270849—41——2 
