54 



The female form which we have referred to this species has the front 

 convex, finely punctulate-aciculate and very sparsely hairy, the elytra 

 usually rather coarsely and rugosely punctured at the base and much more 

 coarsely punctured throughout than the type; the 2nd segment of the 

 abdomen occasionally with a minute median caudal granule. 



E. subscaber Lee.', Am. Phil. Soc. Proc. 15: 371, 373, 1876. The type of 

 subscaber is a male, with flattened, aciculate and hairy front, and shining, 

 sparsely punctured pronotum. The elytra are scabrous at the base as in 

 our female form, but very finely punctured behind, the interstrial punctures 

 but little smaller than those of the striae; the striae hardly impressed but 

 marked by a fine impressed line. The 2nd segment without a granule, and 

 rather feebly acute in front; the 5th segment with a feeble median longi- 

 tudinal carina. It was described from Vancouver but we have never 

 taken a similar specimen in British Columbia. The other two types in 

 Leconte's series are females identical with those just referred to as prob- 

 ably the female of ventralis. 



It is possible that the type of subscaber Lee. is an abnormal individual of 

 ventralis Lee., or it may be a distinct species. Although described from 

 Vancouver it is not duplicated in our large collection. 



Host tree. Grand fir. 



Distribution. Vancouver island and the coast of British Columbia. 



THE HYLESININ^E. 



The Genus Crypturgus Erichson. 



Wieg. Archiv., 1: 60, 1836. 



Key to the Species. 



A The sutural stria3 suddenly and strongly impressed on the basal fourth; 

 the surface brightly shining, the pronotal punctures moderately large 

 and deep; the interspaces nearly as wide as the striae, shining, smooth 

 and sparsely punctured on the disc; the pronotum strongly rounded on 

 the sides, suboval. atomus Lee. Page 54. 



\A The sutural striae feebly impressed throughout; the surface feebly shining, 

 the pronotal punctures very small and numerous; the interspaces 

 narrower than the striae and strongly granulate; the pronotal sides 

 nearly parallel on the caudal half, much more strongly narrowed in 

 front than behind the middle. 



B The pronotal punctures very feebly impressed; the elytral punctures 

 very coarse and the interspaces extremely narrow. Pennsylvania. 



corrugatus Sw . 



BB The pronotal punctures rather strongly impressed ; the elytral punctures 

 moderately coarse, and the interspaces decidedly narrower than the 

 striae. The Great Lakes to the British Columbia coast. 



borealis Sw. Page 54. 

 Crypturgus atomus Lee.; Am. Ent. Soc. Trans. 2: 152, 1868. 



Length, about 1 mm.; moderately slender, brown to nearly black, 

 shining; pronotum rounded on the sides, rather sparsely punctured; the 

 elytra moderately punctate-striate, the sutural striae strongly impressed on 

 the basal third; the interspaces convex, smooth, uniseriately punctured, 

 sparsely on the disc; the male with the postepistomal area of the front 

 plano-concave, coarsely setose-punctate, the female with that area plano- 

 convex. 



Host trees. Pines, Spruces, Balsam, and Larch. 



Distribution. Eastern Canada from Nova Scotia to the Great Lakes, and 

 Eastern United States. This species, like borealis, usually starts its tunnels 

 from the side of those of Dendroctonus, Ips, Polygraphus, or Dryoccetes. 



