112 



very narrowly recurved at the sides ; the pronotum finely, densely punctured 

 behind; the elytra shining, hardly striate, finely deeply punctured in numer- 

 ous rows, the interstrial punctures nearly as large and numerous as those 

 of the striae, and uniseriate except on the sides and the second interspace; 

 the declivity nearly vertical, excavated, densely deeply punctured and 

 pubescent, with three teeth on each side, the first smallest and close to the 

 second, the third longest, straight and stout, the acute apical margin very 

 wide. The male has a compressed median tubercle followed by a faint 

 carina on the front of the head; the female has the faint median frontal 

 carina only, and the declivital armature is less coarsely developed. 



Host tree. Sitka Spruce. 



Distribution. The coast region of Alaska and British Columbia, south 

 probably throughout the range of its host tree. 



Ips radiatae Hopk.; Proc. Ent. Soc. Wash., Vol. 17, 54, 1915. 



Original description: " Pronotal and elytral punctures moderately 

 coarse. Elytra with strial punctures not distinctly coarser than those of 

 the interspaces." " California to Idaho, in Pinus radiata and Pinus 

 contorta." It is closely allied to Ips concinnus Mannh. 



This is possibly the species before me, represented from California in 

 Pinus radiata and P. contorta; Grant Co., Oregon, in Pinus contorta; and 

 British Columbia in Pinus contorta. It is apparently rare in British Colum- 

 bia. It is of the size and shape of concinnus and differs specificially from 

 it in the following characters: The pronotum with rather coarse punctures 

 behind, closer on the sides, a little sparser on the disc, not granulate and 

 not roughened on the disc; the elytral punctuation nearly as in concinnus 

 but distinctly coarser, and deep so that the surface is variably rugulose, 

 the punctures of varying size near the suture; the interstrial punctures 

 nearly as coarse as those of the striae and somewhat irregular so that the 

 rows of punctures are often less distinct; the declivital armature similar, 

 but the 2nd and 3rd teeth of the male stouter than in the male of concinnus; 

 the hairs on the face of the declivity minute and inconspicuous; the male 

 front more densely granulate with the median fovea very deep and funnel- 

 shaped. 



Two specimens that are probably females of this species have the 

 median funnel-shaped fovea of the front succeeded dorsally by a shining, 

 shallow sulcus, and the epistomal tubercle minute; the pronotum as in the 

 males described above, but more densely punctured ; the elytral punctuation 

 similar; the declivital teeth less coarse, the 2nd acute, followed by a faintly 

 developed ridge, the 3rd tooth slender, cylindric, sub-capitate and sub- 

 acute. 



Ips calligraphus Germ.; Ins. Nov., 461, 1824 (Bostrichus) ; exesus Say, Acad. 

 Nat. Sci. Phil. Jour. 5: 255, 1826; ed. Lee. 2: 317 (Bostrichus); chloroticus 

 Dej., Cat. 332, 1837; conformis Dej., Cat. 332 (Bostrichus)', prcemorsus 

 Eichh., Berl. Ent. Zeit., 401, 1867 (Tomicus). 



The largest species of the genus in eastern Canada; length, 4-8 mm. 

 to 6-5 mm.; the sutures of the antennal club very strongly angulate; the 

 pronotum sparsely, finely punctured on the disc behind; the elytral striae 

 distinctly impressed, the sutural striae stronger; the strial punctures close 

 and coarse; the interspaces convex, finely uniseriately punctured on the 



PLATE 26. 



Dryocoetes betulce Hopk.; Tunnels in yellow birch; one-half natural size (Original). 



