CLASSIFICATION AND DESCRIPTION OF COMMON INSECTS 1 43 



cornicles; inhabits the apple throughout the season; winged females 

 occur during summer. Causes curUng of the leaves to some extent, 

 those of young trees suffering most. Several (10-15) generations 



Fig. 96. — Green apple aphis {Aphis pomi): a, alate or winged form; b, apterous 

 or wingless form; c, oviparous female; d, male; e, antenna of winged form. 



in a season, and each generation shorter than 3 weeks; each mother 

 produces about 70 young (Fig. 96). 



Rosy Apple Aphis {Aphis sorbi Kalt. = A. malijolm Fitch = A. 

 Pyri Boyer).— This shade-loving aphis collects around the flower buds, 

 the developing fruits and on the under side of the leaves. It causes 

 nearly all the curling of the leaves and the "cluster-apples." Larger 

 than preceding; J^ inch long. Wingless females blue; honey-tubes 



