PLATE V. CiCADIDAE. 



1. Tibicina septendecim Linnaeus, — periodical cicada or seventeen 



year locust, adult and pupa skin. 



2. Tibicina septendecim Linnaeus. 



3. Tibicen lyricen DeGeer. 



4. Tibicen linnei Smith and Grossbeck. 



5. Tibicen canicular is Harris. 



6. Tibicen chloromera Walker, — male, underside. 



7. Tibicen aidetes Germar, — pupa skin. 



8. Tibicen auletes Germar. 



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



