INSECT PESTS OF TIMBER 125 



most suitable. In the following spring, with 

 the budding leaves, the larvse emerge and at 

 once they begin to roll the leaves on which they 

 are about to feed. Within the rolled leaves they 

 can and do Hve and feed, protected in this 

 manner from all harm. 



The Pine Shoot Tortrix Moth is very destruc- 

 tive to Northern and Austrian Pines in certain 

 parts of the country. During the summer the 

 females deposit their eggs on the tips of the 

 Pine shoots. The larvae emerge in early autumn 

 and at once proceed to attack the shoots, there- 

 by causing a flow of resin, within which they 

 hibernate for the winter. In the spring, the 

 larvse attack the leading bud causing it either 

 to die or to become hopelessly distorted, much 

 to the detriment of the growth of the tree. 



SucKiNa PESTS OF FOREST TREES. Order 

 Rhynchota. Amongst the Khynchota or beaked 

 insects, we find an enormous number of insects 

 which^are harmful to plant hfe and a goodly 

 host injurious to forest trees. The majority of 

 these pests belong either to the Coccidce (Scale 

 insects) or to the Aphididce (Green flies). Prac- 

 tically every scale insect is injurious to vegeta- 

 tion, and as the class is a large one we will 

 mention but a few typical examples. 



Of all the Scale insects none is better known 



