1906 



ENTOMOLOGICAL SOCIETY. 



125 



The direct injury done to the stem or timber part of the tree affects 

 the forester most seriously. One of the Cossidse or Carpenter moths, Prio- 

 noxystus rohinice, was taken emerging from the sugar maple in the vicinity 

 of Ridgeway, Ontario. The work of this Cossus moth was noticed in several 

 trees in the same vicinity. These same maples are infested with one of the 

 Siricidee which I take to be Tremex columha. (Fig. 28.) 



In the College nursery some Austrian pines about three feet high 

 showed signs of dying in August. Upon examination it was found that the 

 stems in some places were completely girdled beneath the bark. This work 

 was being done by one of the Curculionidse, Pissodes strobi, (Fig. 61), de- 

 scribed in Bulletin 22, Division of Forestry. In July the leaves of these 

 pines began to droop and by August they had turned quite brown. In the 

 second week of October I took a number of mature insects from their little 

 cells beneath the bark. Upon a further examination about the first of 

 November I found they had left this retreat for hibernation in other quarters. 



Fig. 61 . Pissodes strobi, 

 Pine-Curculio. 



Fig. 62. Tunnels of Scolytus beetle. 



Fig. 63. Scolytus beetle and its tun- Fig. 64. Tunnels of Scolytus Fig. 65. 



nels. beetle. ' Buprestis borer. 



