118 



but little longer than the second, more cylindric, blunt and incurved; the 

 male with the front minutely granulate-punctate and hairy, rather closely 

 in front of the eyes, with a very small median tubercle, the granules and 

 punctures usually separated with the background distinct. This is vastly 

 different from interruptus, with the front very densely and much more 

 coarsely granulate and hairy, or from dubius in which the frontal granules 

 are much coarser than in interruptus and isolated. There is considerable 

 variation in the size of the punctures of pronotum and elytra, and in some 

 the elytral striae are distinctly impressed. 



Host trees. White Spruce, Red Spruce, Engelmann's Spruce; doubt- 

 fully recorded from Balsam Fir and Eastern Hemlock. 



Distribution. Newfoundland, Nova Scotia, through the northern 

 forests across Manitoba, Saskatchewan, and Alberta, and in the Rocky 

 mountains of Alberta and British Columbia. 



It is known to me only as a secondary enemy. 



Ips interruptus Mannh.; Bull. Mosc., 357, 1852; 234, 1853 (Bostrichus); Eich- 

 hoff, Rat. Tomic., 238, 1878. 



The original description and Leconte's notes are very meagre. There 

 are probably four species in the Leconte collection under this name. The 

 first was probably received from Mannerheim, and fixes the species. 



The length varies from 4 to 5 mm. ; the head has the front rather coarsely 

 punctured above, very densely, finely granulate and closely hairy on the 

 cephalic half, the granulate portion strongly convex, a transverse impression 

 behind the epistoma, succeeded by a small median fovea; the pronotum 

 slightly longer than wide, rather coarsely and sparsely asperate in front, 

 usually coarsely not closely punctured behind; the elytral striae slightly 

 impressed, the sutural striae wide and deep, regularly widened behind, the 

 strial punctures moderate in size and closely placed; the discal interspaces 

 moderately convex, rather finely and uniseriately punctured; the declivital 

 armature of the male pini type, with the third tooth stouter than the second 

 and blunt in the female; the male has the third tooth coarser and capitate, 

 and the front a little more coarsely granulate. 



Host trees. Sitka Spruce, Western White Pine. 



Distribution. Alaska and the Pacific Coast region of British Columbia. 



Ips hunteri Sw.; Dom. Ent. Br., Dept. Agric., Bull. 14: 31, 1917. 



Very closely allied to I. interruptus Mannh. in size and sculpture, from 

 which it differs most noticeably by the regularly impressed elytral striae, 

 the feebly granulate first and second elytral interspaces, and the confused 

 punctures of the alternate interspaces on the elytra. 



The front of the head is convex, opaque, densely granulate, with fine 

 and coarser granules intermixed, and closely hairy; the club with the first 

 two sutures bisinuate; the pronotum about as wide as long, narrowly 

 rounded in front, slightly wider at hind angles (this character variable); 

 rather finely and densely asperate in front, moderately, not closely punc- 

 tured behind, more closely and coarsely on the sides; the elytral striae 

 narrow, regularly, distinctly impressed, the sutural striae deeper; the strial 

 punctures small and close; the interspaces finely, uniseriately punctured 

 in front, decidedly confused and feebly granulate near the declivity, the 

 punctures of interspaces 1 and 2 feebly granulate behind but hardly 

 so on the basal half; the declivity coarsely punctured, not closely, with 

 four spines, the third stout, capitate and acute in the male, more slender 

 and less distinctly capitate in the female. 



Described from a series of about 180 specimens collected by Prof. 

 S J. Hunter, at Creede, Colo., 8,844 ft. 



