JAN 18 1C;S 



Bulletin 



OK THE 



Illinois State Laboratory 



Olf 



Natural History 



Urbana, Illinois, U. S. A. 



STEPHEN A. FORBES, Ph.D., I^.E.D., 

 Director 



Vol. XI. September, 1915 Article II. 



AN ECOLOGICAL STUDY OF PRAIRIE AND FOREST 

 INVERTEBRATES 



Charles C. Adams, Ph.D. 



