30 



by the straight marginal fringe, circularly rounded on the sides and behind. 

 The sides of the pronotum from above are nearly evenly arcuate, only faintly 

 constricted in front of the middle, and more elongate. 



The type is from Athabaska Landing, Alta. ; in Picea canadensis. Abund- 

 ant throughout northern Alberta and northeastern British Columbia in spruce 

 and larch. 



Pityophthorus nudus, n. sp. 



Description of male. — The length, l-6mm.; the width slightly more 

 than one-third the length, 4:11; nearly glabrous; the elytral striae in rows and 

 the declivity sulcate with the apex acuminate. 



The head has the front plano-convex, closely, rather coarsely, roughly 

 punctured, with a moderate median carina terminated in front by a median 

 postmarginal granule; the pubescence fine and inconspicuous; with the usual 

 postepistomal transverse groove from which arises a sparse epistomal fringe of 

 short yellow hairs; the eyes rather short oval, very coarsely granulate, deeply 

 narrowly emarginate in front, margined above and in front by a row of setigerous 

 punctures; the antennal club with the sutures nearly straight, strongly chitinized, 

 the first two recurved at the sides, the third procurved, the outer part of the 

 funicle a little longer than the pedicel. 



The pronotum is as long as wide, nearly truncate behind, feebly arcuate 

 on the sides to beyond the middle, faintly constricted in front of the middle, 

 broadly rounded in front, and rather strongly regularly serrate on the cephalic 

 margin; the cephalic half concentrically asperate, the first row distant from the 

 margin, the remaining rows less perfectly concentric and broadly curved; the 

 summit prominent; the caudal half shining, sparsely and rather finely punctured 

 on the disc, much more weakly on the sides, with an impunctate median space 

 and an impunctate area on the middle of each side. The ventral surface of the 

 prothorax is coarsely punctured in front, smoothly shining and excavated 

 behind. 



The elytra are slightly narrower than the pronotum; with the sides nearly 

 parallel, faintly arcuate, suddenly narrowed beyond the bend of the declivity, 

 and rapidly convergent to the strongly acuminate tip; the suture elevated on 

 the disc; the punctures in regular strial rows; the striae hardly at all impressed; 

 the strial punctures moderate in size, deep and closely placed; the interstrise 

 impunctate except near the side margin, narrow, shining, slightly transversely 

 rugose in places. The declivity is steep, triangular as viewed from above, with 

 the suture very strongly elevated behind, acuminate at the tip; with the second 

 interspace sulcate,- moderately impressed, very wide at the middle, brightly 

 shining, narrowed at the tip; the sides of the declivity retuse on the upper half, 

 the convexity with two subregular rows of minute granules, without long hair; 

 the suture similarly rather confusedly minutely granulate and not hairy; the 

 elytra nearly glabrous except for the few long hairs of the declivity, and a few 

 near the side margin. The last ventral segment is very broadly and deeply 

 emarginate; the ventral segments coarsely punctured. 



The female has the front densely finely punctured towards the epistoma in 

 front of a more or less distinct transverse ridge, and densely clothed with fine 

 short pubescence. 



This species is found in twigs of Picea canadensis in Ontario, Quebec, and 

 in New York state. 



Ips englemanni, n. sp. 



This species agrees with tridens in all characters of the pronotum and elytra; 

 it differs only in the nature of the frontal tumulus, which is much less elevated, 

 with its cephalic face densely clothed with very long, incurved, light yellow hairs. 



