Explanation of Plate 40. 



Drawn in colors by Ella M. Palmer. 



Showing the feeding and spinning habits of gypsy moth cat- 

 erpillars of different ages. The bark on the lower part 

 of the apple twig has been eaten by the young cater- 

 pillars early in the season. 



Showing the method of feeding upon a young growing shoot 

 of white pine {Pinus strobus) . 



Red oak {Quercus rubra) leaf attacked by a nearly full- 

 grown gypsy moth caterpillar. 



