246 THE AMERICAN NATURALIS1. [VoL. XXXII. 
From a study of the two nymph wings figured here, it is an 
easy matter to trace the homologies of the veins and cells of 
Fic. 16. — Cicada, wings of adult. 
the fore wing of the adult; these are indicated by the lettering 
of this part in Fig. 16.1 The more difficult points are eluci- 
Fic. 17. — Cicada, base of fore wing. 
1 In those cases where the veins are not numbered, their | logies are indicated 
by the numbering of the cells behind them. 
