Bulletin 



OP THE 



Illinois State Laboratory 



Olf 



Natural History 



Urbana, Illinois, U. S. A. 



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

 Director 



Vol. XL September, 1915 Article IL 



AN ECOLOGICAL STUDY OF PRAIRIE AND FOREST 

 INVERTEBRATES 



BY 



Charles C. Adams, Ph.D. 



