Bui. 847, U. S. Dept. of Agriculture. 



Plate V!. 



II 





ROUNDHEADED APPLE-TREE BORER. 



A, Ycung apple tree diving from injuries caused by roundheaded apple-tree borers. B, Trunk of 

 young apple tree marked by beak of woodpeckers searching for borers; the larger wounds show 

 where borers have been removed. C, Adult roundheaded apple-tree borers; male above and 

 female below. Slightly enlarged. D, Borer in apple tree; showing cleared space maintained in 

 burrow to allow of free movement of body. Natural size. 



