Fig. 35.- <i, The hyonze birch borer beetle, natural she in louder cm iier : h, the ;;rub 

 or borer ^ natural size above. 



Fig. ;?6.— u, Portion of trunk oj white birch with bark removed to show how the burrows of 

 tlie borer sometimrs zis^as: across each other; b, shows « burrow extending through the 

 iiwod ; ■:, hibernating and transfoi ming chambers in the wood a short distance beneath th 

 bark. • All figures reduced slightly. 



