Iivo 



Bulletin 



OF THE 



Illinois State Laboratory 



OF 



Natural History 



Urbana, Illinois, U. S. A. 



STEPHEN A. FORBES, Ph.D., L.E.D., 

 Director 



Vol. X. June, 1914 Article IV. 



NOTES ON NORTH AMERICAN DIPTERA, WITH DESCRIPTIONS 



OF NEW SPECIES IN THE COLL,ECTlON OF THE ILLINOIS 



STATE LABORATORY OF NATURAL HISTORY 



BY 



J. K. Malloch 



