Bulletin 



OVXHB 



Illinois State Laboratory 



o» 



Natural History 



Urbana, Illinois, U. S. A. 



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

 Director 



Vol. XI. September, 1915 Article II. 



A.N ECOI^CGICAL, STUDY OF PRAIRIE AND FOREST 

 INVERTEBRATES 



BY 



Charles C. Adams, Ph.D. 



