ZO RAPT ERA 



271 



tion of the wings is represented in the figure. As the tracheation of 

 the wings of nymphs has not been studied, I will not venture to make 

 any suggestions regarding the homologies of the wing-veins. 



pig_ 309. — Zorotypus hubbardi: i, winged adult female; 2, adult female that had 

 shed her wings; 3, nvmph of winged form; 4, wingless adult female. 5. An- 

 tenna of adult wingless Zorotypus snyderi. (From Caudell, m Proc. Ent. Soc. 

 Wash., Vol. 22.) I 



