6 



CIRCULAR 10 6, U. S. DEPARTMENT OF AGRICULTURE 



or less triangular in shape, whether viewed dorsally or ventrally, 

 or from the side, and with their greatest height and width at the 



Figure 4. — Terminals of apple twigs killed by oviposit ion wounds (a) of the dark- 

 colored tree hopper. Three-fourths natural size 



thorax and tapering gradually backward. (Fig. 1; fig. 9, G and H.) 

 The upper covering of the tree hoppers is composed of membranous 



