SMITHSONIAN MISCELLANEOUS COLLECTIONS. 



171 



MONOGRAPHS 



D I P T E E A 



NORTH AMERICA. 



PREPARED FOR THE SMITHSONIAN INSTITUTION 

 BY 



H. LOEW. 



PART II. 



EDITED BY 



R. OSTEN SACKEN, 



Wi SHINGTON: 

 SMITHSONIAN INSTITUTION. 



JANUARY, 1S64. 



