AN INVESTIGATION OF EVOLUTION IN 



CHRYSOMELID BEETLES OF THE 



GENUS LEPTINOTARSA 



7k. p. J. 



-juu 



c^ 



^c 



a*- /*- 



BY 



WILLIAM LAWRENCE TOWER 



Instructor in Embryology, University of Chicago 

 Associate, Station for Experimental Evolution 



WASHINGTON, D. C. 



Published by the Carnegie Institution of Washington 

 1906 



