Bulletin 



OF THE 



Illinois State Laboratory 



OF 



Natural History 



Urbana, Ii^linois, U. S. A. 



STEPHEN A. FORBES, Ph. D., EE. D. 

 Director 



Vol. XII. March, 1917 Article III. 



A PREEIMINARY CEASSIFICATION OF DIPTERA, EXCEUSIVE 

 ~~OF PUPIPARA, BASED UPON EARVAE AND PUPAE 

 CHARACTERS, WITH KEYS TO IMAGINES 

 IN CERTAIN FAMIEIES. PART I. 



BY 



John R. Malloch 



