MEMOIRS 



OF THE 



AMERICAN ENTOMOLOGICAL SOCIETY 



NUMBER 3 



A VENATIONAL STUDY 

 OF THE SUBORDER ZYGOPTERA 



(ODONATA) 



WITH KEYS FOR THE IDENTIFICATION 



OF GENERA 



BY 

 PHILIP A. MUNZ 



PUBLISHED BY THE AMERICAN ENTOMOLOGICAL SOCIETY 



AT THE ACADEMY OF NATURAL SCIENCES 



PHILADELPHIA 



1919 



