53 



Length, 4 • 2 mm. to 7 mm. ; black with pubescence brown, legs, antennae, 

 and front margin of pronotum variably reddish. The male has the front 

 broadly flattened, strongly aciculate, and fringed with long, incurved hairs; 

 the ventral declivity deeply excavated, the cephalic margin of 2nd segment 

 strongly produced, recurved and acute on the median line, with an acute 

 median carina, the 3rd segment with three long caudal spines, the 4th 

 segment with one median spine, the 5th segment very short, densely 

 punctured and pubescent. The female has the front subconvex, slightly 

 impressed in front and behind, finely aciculate, with moderate, erect, 

 brownish hairs; the 2nd segment vertical, the 3rd and 4th segments 

 normal, the 5th as long as the 3rd and 4th united, finely pubescent. 



Host tree. — Hickory. 



Distribution. — Widely distributed throughout the Eastern States as far 

 west as Utah (our collection), but extremely rare in Canada; taken at 

 Rigaud, Que., and Guelph, Ont., and may be said to occur in southern 

 Quebec and southern Ontario. 



A very destructive enemy of hickory. 

 Eccoptogaster piceae Sw.; Can. Ent., 42: 33, 35, 1910. 



Length, 2-7 mm. to 3-2 mm.; nearly black, readily identified by the 

 characters given in the key, its host trees and its distribution (PI. 17, fig. 10). 



Host trees. — White Spruce, Balsam Fir. 



Distribution. — Throughout Eastern Canada west to the Peace River 

 Valley in northern Alberta. Breeds usually in half-dried limbs. 

 Eccoptogaster unispinosus Lee; Am. Phil. Soc. Proc, 15: 371, 372, 1876 

 (Scolytus) . 



A small shining black species; length, 2 • 3mm to 3 mm. ; the elytral strise 

 with small punctures, distinctly but narrowly impressed; the interspaces 

 finely uniseriately punctured; the elytral punctures somewhat scabrous at 

 the basal margin; the 2nd abdominal sternite with a spine at the caudal 

 margin, long, flattened and blunt in the male, much shorter, conical and 

 acute in the female. 



Host trees. — Douglas Fir. 



Distribution. — Generally distributed throughout the Douglas fir region 

 of British Columbia, from Vancouver to Jasper park, Alberta. 



Eccoptogaster tsugae Sw.; Dom. Ent. Br., Dept. Agric, Bull. 14: 32, 1917. 



Length, 3-4 mm.; the female front convex, aciculate-punctate and with 

 fine hairs; the male front flat, more strongly and coarsely aciculate-punctate, 

 the elytra hardly scabrous at the base, the 2nd abdominal sternite more 

 coarsely margined. 



Host trees. — Mountain Hemlock, Douglas Fir. 



Distribution. — Cherry Creek valley, British Columbia; Glacier, B.C.; 

 Jasper park. Alberta. Found in dying bark. 



Eccoptogaster monticolae Sw.; Dom. Ent. Br., Dept. Agric, Bull. 14: 32, 1917- 



Length, 2 • 8 mm. ; with the secondary sexual characters of tsugce. 



Host trees. — Western White Pine, Douglas Fir. 



Distribution. — Arrowhead, B.C. (white pine); Creighton valley, B.C. 

 (Douglas fir). 

 Eccoptogaster ventralis Lee; Am. Ent. Soc. Trans. 2: 167,1868 (Scolytus). 



Length 3.75 mm.; the type of ventralis Lee. is a male, apparently 

 identical with a common form in British Columbia. The front is flattened, 

 coarsely aciculate, punctured and conspicuously hairy; the elytral punctures 

 rather small, somewhat coarser but only slightly rugose at the base; much 

 less coarsely sculptured than in the female; the 2nd ventral segment strongly 

 margined in front and with a decided median tooth-like carina at the caudal 

 margin. 



