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 



/ WAR -3 1921 'l 



PUBLISHED BY THE AMERICAN ENTOMOLOGICAL SOCIETY 



AT THE ACADEMY OF NATURAL SCIENCES 



PHILADELPHIA 



1919 



