74 



coarsely punctured; the interspaces convex, minutely granulate-punctate 

 and uniseriately asperate ; the alternate intervals wider and strongly convex 

 on the declivity ; the side pieces of meso-and metathorax densely scaly. 



Host tree. — Western Alder. 



Distribution. — Coast and southern interior of British Columbia, and 

 southward to California. 



The Genus Hylurgopinus, new genus. 



Of medium size; antennal funicle 7-segmented, club feebly compressed, 

 sutures 1 and 2 strongly chitinized, last two segments longer than 2; beak short; 

 protonum coarsely, irregularly punctured, not impressed; forecoxae widely 

 separated; metepisternum without dense scales; proventriculus with costal 

 teeth almost obsolete, the disc finely, densely granulate, the transverse lines 

 indistinct, chitinized on the sides. 



The type is Hylastes rufipes Eichh., the only species known in our fauna. 



Hylurgopinus rufipes Eichh.; Berl. Ent. Zeit., 147, 1868, (Hylastes); opaculus 

 Lee, 1868 (Hylesinus) . 



Length, 3-25 to 3-75 mm., the epistomal lobe nearly as long as wide; 

 the pronotal punctures coarse, close and irregular; elytral striae deep, 

 punctures coarse, close and deep; interspaces minutely punctured and with 

 an irregular row of asperities. 



Host trees. — Elm, Basswood. 



Distribution. — Eastern United States; less abundant in Eastern Canada. 



The Genus Pseudohylesinus Swaine. 

 Dom. Ent. Br., Dept. Agric, Bull. 14: 11, 1917. 



Key to the Species. 



A The first segment of the antennal club much longer than the second; the 

 9th interspace not strongly serrate about the declivity. 

 B The antennal club hardly flattened, subconical, segment 1 as long as 

 segments 2 and 3 together; the sides of the elytra parallel on about 

 the basal two-thirds; a large species, 5 • 5 mm. in length. 



granulatus Lee. Page 75. 

 BB The antennal club evidently flattened; stouter species, with the sides 

 of the elytra parallel on about the basal half; smaller species. 

 C The vestiture slender and almost entirely hairlike on the pronotum; 

 the scales of the elytra small and elongate, hairlike towards the 

 base. 

 D The elytral interspaces strongly convex and coarsely, uniseri- 

 ately asperate; the strial punctures coarse and the striae wider; 

 the sides of the elytra parallel on the basal half. 

 *E The elytra more strongly sculptured; the striae nearly as 

 wide as the interspaces; the elytral scales small but rather 

 wide behind. Oregon. nobilis Sw. 

 EE The elytral striae distinctly narrower than the interspaces; 

 the elytral scales very elongate. tsugae Sw. Page 75. 

 DD The elytral interspaces flat on the disc and sides; the asperities 

 confused on the wider 3rd interspaces of the disc; the strial 

 punctures moderate; the elytra slightly inflated behind, 

 slightly wider behind the middle than at the base. 

 obesus Sw. Page 76. 



' Barely distinct from tsuagce; this may prove to be identical. 



