The Bronze Birch Borer. 153 



birches. Civic Improvement Societies could render efficient aid in such 

 work. 



Briefly then, there is no kiiozvn way of preventing tJiis bronze birch 

 borer from attacking zvhite birches, and the only practicable and effective 

 method yet found for checking its ravages is to promptly cut and burn 

 the infested trees in autumn, in winter, or before May ist. There is no 

 possibility of sai'ing a tree zvhen the top branches are dead, as shozvn in 

 frontispiece and in Fig. ^4. Cut and burn such trees at once and thus 

 prevent the spread of the insect. 



