Bui. 886, U. S. Dept. of Agriculture 



Plate IV. 



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Work of Spotted Apple-Tree Borer. 



A, Nearly mature larva working in heart of apple wood; natural size. B, Pupa occupying 

 natural position at upper end of gallery in heart of apple wood; slightly enlarged. C, Section 

 of trunk of young apple tree having a swollen and roughened appearance as a result of injury 

 by borers. 



