Bui. 887, U. S. Dept. of Agriculture 
Plate 
Stages of the Pear Borer. 
A, Eggs in natural position; much enlarged. B, Larva, pupa, and cocoon; enlarged. C, D, 
Empty pupa cases projecting from the bark. E, Adult. F, Cocoons exposed by removing 
scales of apple bark; enlarged. G, Larva in hibernaculum; slightly enlarged. 
