THE OHIO STATE UNIVERSITY BULLETIN 



Volume XVII Number 31 



OHIO BIOLOGICAL SURVEY 



BULLETIN 1 



ANNOUNCEMENT 



SYRPHIDAE OF OHIO 



June, 1913 



PUBLISHED BY THE UNI VERSITY AT COLUW s 



Entered as second-class matter November 17, 1905, at the postottict ai 

 Columbus, Ohio, under Act of Congress, Jtily 16, tSq^ 



