MEMOIRS 



OF THE 



AMERICAN ENTOMOLOGICAL SOCIETY 



NUMBER 1 





%> 



THE CRESSON TYPES 



OF 



HYMENOPTERA 



BY 

 EZRA TOWNSEND CRESSON 



PUBLISHED BY THE AMERICAN ENTOMOLOGICAL SOCIETY 



AT THE ACADEMY OF NATURAL SCIENCES 



PHILADELPHIA 



1916 



SMITHSONIAN iH^Jf °* 

 WASHINGTON **• *' ' 



