B 



Fig. 72. Dorsal wax gland of rosette aphid, second generation. 

 A & B, a pair on head. C & D, a pair on prothorax. Notice 

 that the sections are not uniform in number as is often the case. 





FlGS. 73 and 74. Woolly Aphid. Winged and wingless forms. 

 Greatly enlarged (After Marlatt.) 



Fics. 75 and 76. Mature sexual individuals of the Woolly 

 Aphid, — the oviparous female and male. Real size shown in 

 circles at right of figures. (After Ahvood.) 



Fig. 11. Apple root, showing knotty growth caused by Woolly Aphid. 



