22 



This species is known to the writer only from northern Alberta and northern 

 Saskatchewan, where it breeds in Picea canadensis. Its habits are similar to 

 those of bivittatum. 



Trypodendron rufitarsis, Kirby. 



This species is closely allied to bivittatum and has long beein considered a 

 synonym. It is apparently a distinct species. Our material was compared 

 with Kirby's type in the British Museum by Mr. R. N. Chrystal, and found to 

 be the same. 



Description of the female. Of the size and shape of T. bivittatum Kirby, 

 except that the elytra are distinctly narrower towards the base, and wider 

 behind the middle; bivittatum usually has the elytra slightly widest about the 

 middle. The structural characters of the head and pronotum are practically 

 as in bivittatum except that the pronotum is more minutely and nearly obsoletely 

 punctured on the sides behind, and the front of the head is much less densely, 

 and on the upper half very much more coarsely granulate. The elytral strise 

 are very narrow and slightly impressed, a little more strongly on the declivity; 

 the strial punctures small and closely placed; the interspaces flat, smooth, with 

 faint traces of a median stria, the interstrial punctures sparse, uniseriate, faintly 

 impressed, with short slender setae. The elytral interspaces of bivittatum are 

 usually somewhat transversely wrinkled and the strial punctures are usually 

 coarser. The colour in rufitarsis is black, with the antennas and legs dark red- 

 brown; the pronotum with a median band, less than one-third the width, extend- 

 ing from the base across the summit to the apex, dark smoky red, the colour 

 stronger towards the basal margin. The elytra are without stripes, dark smoky 

 red, becoming darker on the sides and nearly black on the sides towards the 

 base. The declivity has the second interspace very narrow, impunctate, 

 moderately impressed, so that the sulcus is narrow and shallow, with the third 

 and first interspaces not strongly elevated and with the granules practically 

 obsolete. 



Distinguished from the allied species by the colour, the coarsely and rather 

 sparsely granulate front, the shallow declivital sulcus, with impunctate second 

 interspace, and the nearly obsolete punctures on the hinder half of the sides of 

 the pronotum and nearly obsolete declivital granules. 



Trypodendron ponderosae, n. sp. 



This species is very closely allied to rufitarsis Kirby, but is distinguished 

 by its constantly darker colour, deep shining black, with an indefinite area on 

 the disc of the pronotum and elytra very dark reddish brown; the interstrial 

 punctures very small; the declivital striss very strongly impressed, with the 

 second interspace deeply sulcate. 



Southern Coast and Interior of British Columbia, in Pinus ponderosa, 

 Picea engelmanni, and Pseudotsuga mucronata. 



Anisandrus populi, n. sp. 



This species belongs to the obesus group and is intermediate in characters 

 between obesus Lee. and minor Swaine. 



Description of female. Length, 3-2 mm.; of the shape of obesus, slightly, 

 but distinctly more slender, with the sides of the elytra parallel as far as the 

 abrupt angle of the declivity. 



The head has the front plano-convex, shining, opaque towards the vertex, 

 coarsely, rather sparsely punctured, more closely and finely on the sides in 

 front, transversely impressed on the epistoma on each side of the .distinct 

 median carina. 



