28 



the sulcus, with the accompanying long hairs, which in this species are directed 

 caudo-mesad, with shorter sparse stiff hairs on the sides and ventral margin of 

 the declivity; the apical margin narrowly rounded but not acuminate. The 

 ventral surface is finely, not closely punctured, and finely pubescent; the last 

 sternite is very deeply emarginate. 



The male has the front flattened, semi-circularly margined behind, very 

 strongly so across the middle; closely, deeply and roughly but not coarsely 

 punctured; with a small median tubercle on the epistoma; rather closely 

 pubescent with fine short hairs of equal length; the pronotum more distinctly 

 constricted, with the sides straighter behind. The declivity has the granules 

 and setae somewhat coarser. 



A long series from Pinus contorta of British Columbia Coast Region. The 

 type series was collected by Mr. Tom Wilson at Adams Lake, B.C. 



Pityophthorus granulatus, n. sp. 



This species is so closely allied to nudus that a detailed description is 

 unnecessary. It differs from nudus chiefly in the usually more coarsely punctured 

 pronotum and elytra, with the elytral interspaces transversely rugose, and the 

 strongly, uniseriately granulate-setose suture and lateral convexities of the 

 declivity. The secondary sexual characters appear to be the same as in nudus. 



It is abundant in jack pine in Manitoba, and occurs in pine and balsam in 

 Quebec province, and in Nova Scotia. 



Pityophthorus ramiperda, n. sp. 



Description of adult. The form is rather stout, 2| times as long as wide; 

 with the pronotum strongly arcuate on the sides, and the declivity very steep 

 and only slightly retuse; the length, 2 1mm. 



The head has the front moderately convex, closely rather finely, deeply 

 punctured, with a median carina on the cephalic half extending to the epistomal 

 margin; the vertex smooth; the antennal club very large, short oval, the first 

 two sutures faintly arcuate, the second before the middle, the third strongly 

 arcuate, the first two segments short, subequal, the third and fourth equal in 

 length and together longer than the first two united, sparsely pubescent with 

 short erect hairs, the sutures not septate. 



The pronotum is about as wide as long, more strongly arcuate behind than 

 usual, the hind angles rounded, strongly arcuate on the sides, constricted before 

 the middle and broadly rounded on the front margin, which is serrate with the 

 median asperities longest; the summit slightly in front of the middle; the 

 cephalic portion concentrically finely asperate; the caudal portion rather 

 coarsely, subgranulately punctured, more finely near the lateral margins, with 

 a strong well-defined median carina from the summit to the caudal margin, 

 and the basal marginal line fine across the disc but distinct. The ventral surface 

 of the prothorax is smooth and shining, with a few small punctures near the front 

 margin. 



The elytra are almost exactly twice as long as the pronotum, 75:39; three- 

 fifths as wide as long; about as wide as the pronotum, slightly wider at the 

 middle; the base truncate; the sides faintly arcuate, subparallel for about four- 

 fifths the length, then broadly rounded to the hind margin, which is sulcato- 

 truncate as viewed from above; the suture elevated on the disc; the punctures 

 in regular rows, the sutural strise moderately impressed, the remaining discal 

 striae hardly impressed, the lateral striae from the eighth outward deeply im- 

 pressed, the ninth very deep and wide; the strial punctures regular, small, 

 deep and closely placed ; the interspaces slightly transversely wrinkled, in places 

 smooth and shining, rather finely, sparsely punctured, more coarsely and closely 



