..jrfjf™ 



Bulletin 



OF THE 



Illinois State Laboratory 



Natural History 



Urbana, Illinois, U. S. A. 



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

 Director 



Vol. XL September, 1915 Article II. 



AN ECOLOGICAL STUDY OF PRAIRIE AND FOREST 

 INVERTEBRATES 



BY 



Charles C. Adams, Ph.D. 



