A VENATIONAL STUDY of the SUBORDER 

 ZYGOPTERA (ODONATA) WITH KEYS 

 for the IDENTIFICATION OF GENERA 



A THESIS 



Presented to the Faculty of the Graduate School 



OF Cornell University for the degree of 



doctor of philosophy 



BY 

 PHILIP A. MUNZ 



MEMOIRS OF THE AMERICAN ENTOMOLOGICAL SOCIETY 



NO. 3. 1919 



