Plate IV 



White Birch on the Driveway, Ottawa, White l^irch at Ottawa destroyed by 

 partially destroyed by Borer Borer (Agrihis anxius). 



(AgriJvs nnxins). 





M.W ' ^ V- "■<"*'i!tJP^^-'*5#'r' _.^jm':-j''-:r>^ 



Kggs of Bronze Birch Borer {Agrilua aiixiu-s) \ 9 diani. 



