522 FAMILY SCOLYTIDAE 



inches in length and are tightly packed with wood-dust and excreta, 

 orange-yellow in colour. The beetles themselves are very sluggish in their 

 movements, being by no means so active as P. major. The beetle passes 

 through at least three generations in the year. 



Further observations are required to be carried out on this insect. 



I have taken it on only a few occasions, and, so far 



Relations to the i , i , 



Forest as my present observations seem to show, it is not 



abundant. This point, however, I put forward with diffi- 

 dence, as the insect seems to have so strong a vitality, and its attacks 

 to be of such a serious nature so far as the amount of bast ruined by the 

 egg and larval galleries resulting from one swarm of beetles is concerned, 

 that it is important that a further stud}' of its habits should be made. 



Polygraphus himalayensis, Stebbing. 



REFERENCE. Stebbing, Ind. For. Mem. Zool. Ser. i, pt. i, 8. 



Habitat. North- West Himalaya. 



Tree Attacked. Chir Pine (Finns longifolia). Jaunsar. 

 Beetle. -Slightly narrower than P. major ; sides of prothorax less angular, shining black, 

 with a very scattered sparse pubescence. Head finely punctate, with the frontal brush of hair 



short and almost obsolete. Prothorax one and a half times as broad as 



Description. long, smooth medianly, with no median longitudinal carina, sides with 



a sparse fine punctation ; the transverse channel in the anterior fourth 



deeper and closer to anterior margin than in major. Elytra very rugose, striae absent in basal 

 half ; sutural stria most prominent in apical half where the rugosities are more open than in 

 basal portion ; pubescence almost absent basally, very sparse in apical half. Length, 3.3 mm. 



I know little about this insect. The specimen from which the beetle is 

 described was taken in a pine tree at Jeromula in Jaunsar. From old 

 galleries examined, the insect was noted to oviposit in the bast of the 

 main bole of old trees. The insect was taken in the bast layer in the middle 

 of October 1906. 



Polygraphus pini, Stebbing. 



REFERENCES. Stebbing, Pofyg. minor, Ind. For. Mem. Zoo]. Ser. i, pt. i, 8 (1908); id. Depart. Notes, 

 i, 239 (1903). [I find that the specific name minor is preoccupied by P. subopacns, Thomson, 

 var. minor, Lindemann (1875)] 



Habitat. North- West Himalaya. 



Trees Attacked. Blue Pine (Finns cxceha) ; Spruce (Ficca inorinda). 

 Jaunsar, Simla, Chamba. 



Beetle. Oblong, sub-cylindrical. Black, shining, elytra with a greyish pubescence. 

 Antennae yellow-brown, club bright yellow. Legs chestnut-brown, tarsi yellow. Smaller than 



major. Upper part of front of head furnished with a central thick 



Description. close circular brush of reddish-yellow hair pointing inwards. Prothorax 



depressed anteriorly, the transverse channel in anterior fourth broader, 



deeper, and markedly prominent both medianly and laterally, the disk more strongly convex in 



posterior three-fourths than in major ; punctures finer and more regularly distributed on surface. 



ytra shining black, twice as long as prothorax, slightly dilated at apex, striate-rugose, the 



Mil ie faint in the basal half, which is coarsely rugose. Abdominal segments black, shining, 



punctate, with a sparse pubescence scattered uniformly over them and not confined to the 



posterior margins as in major. Length, 2.1 mm. to 2.75 mm. PL xlvi, fig. 2, shows this beetle. 



Larva. Resembles that of P. major, but is smaller in size. 



