Bulletin 



OF THE 



Illinois State Laboratory 



OF 



Natural History 



Urbana, Illinois, U. S. A. 



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

 Director 



Vol. XI. September, 1915 Article II. 



AN ECOLOGICAL* STUDY OF PRAIRIE AND FOREST 

 INVERTEBRATES 



BY 



Charles C. Adams, Ph.D. 



