TREE HOPPERS AND THEIR CONTROL 6 



tips. Often the injury by this species begins in that part of the twigs 

 where that caused by the others leaves off. Both types of wounds 

 are shown intermingled on the same twigs in Figure 5, A. 



Figure 1. — A, Buffalo tree hopper, side and front views ; B, green clover tree hop- 

 per ; C, basal or dark-colored tree hopper. X 3 



The buffalo tree hopper places its eggs in pairs of more or less 

 parallel longitudinal cuts. 



Oviposition wounds by tree hoppers furnish suitable entrance for 

 the wooly apple aphid, many colonies of which find lodgment in 

 them. (Fig. 5, B.) Overwintering eggs of the apple aphid 7 are 



Eriosoma lanigerum (Hausm.). 



Aphis pO)ni DeG. 



