^v 



Bulletin 



OF THE 



Illinois State Laboratory 



ov 



Natural History 



Urbana, Illinois, U. S. A. 



STE:pHEN a. FORBES, Ph.D., LL.D., 

 Director 



Vol. IX. January, 1913 Article VI. 



THE MIDSUMMER BIRD LIFE OF ILLINOIS: 

 A STATISTICAL, STUDY 



BY 

 STEPHEN A. FORBES 



i 



