A-.rr B C 



C D 



( 



■rV>s 



E 





,^C^ 1 



^b^^B^HP^^Hb^^^^^K 



Fig. 143. Wax glands of Scliizoneura. A-H, abdominal glands. 

 I-K, head glands. A, S. lan/gera (9-12) reared on apple from elm leaf 

 progenitors. B and C, S. rileyi, pupal glands. D, 6". lanigera, second gen- 

 eration from elm " rosette." E, S. lanigei-a, pupa from apple. F, S. rileyi 

 stem female (52-13). G and H, S. americaua in part. (20-13) wax glands 

 of stem female from roll like Fig. 139 A. G, lateral aspect, H, dorsal 

 aspect. 1, same species as G and H stem female. J, S. lanigc-i-a second 

 generation from "rosette." K, S. lanigera stem female from " rosette." 



