PLATE V. ClCADIDAE. 



I. Tibicina septendecim Linnaeus, — periodical cicada or seventeen 

 year locust, adult and pupa skin. 



Tibicina septendecim Linnaeus. 



Tibicen lyric en DeGeer. 



Tibicen linnei Smith and Grossbeck. 



Tibicen canicularis Harris. 



Tibicen chloromera Walker. — male, underside. 



Tibicen auletes Germar, — pupa skin. 



Tibicen auletes Germar. 



All natural size. Photographs by B. H. Walden. 



