TREE HOPPERS AND THEIR CONTROL 6 



the others leaves off. Both types of wounds are shown intermingled 

 on the same twigs in Figure 5, A. 



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

 parallel longitudinal cuts. 



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

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



Oviposition wounds by tree hoppers furnish suitable entrance for 

 the woolly apple aphid, 6 many colonies of which find lodgment in 

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

 also often present. Occasionally the oviposition scars so weaken 



Eriosoma lanigerum (Hausm.). 



7 Aphis ()0 mi DeG. 



