s 



CIRCULAR 10 6, U. S. DEPARTMENT OF AGRICULTURE 



1. C), is the smallest of the three species and also has pronounced 

 pronotal horns, but it is darker generally and black ventrally. with 

 short hairs on the pronotum, especially in front. The green clover 

 tree hopper, Stictocephala inermis (fig. 1, B), has no pronotal horns. 



Figure 6. — Oviposition wounds of the dark-colored tree hopper : A, In pear 

 B, in willow ; C, in peach ; D, in locust ; E, in apple. Natural size 



LIFE HISTORY OF TREE HOPPERS 



HATCHING OF EGGS 



Hatching starts in early April for most species and continues 

 until early May. The eggs of the dark-colored tree hopper (fig. 

 7, #, b) hatch later than those of other species, beginning to hatch 

 in early May about the time those of the green clover species 

 (fig. 7. c) and the buffalo tree hopper are through hatching. Most 

 hatching takes place on warm, humid mornings, few young nymphs 



