Field Museum of Natural History. . 

 Publication 131. 

 Zoological Series. Vol. IX. 



<rf, n (77.3) 



THE BIRDS OF ILLINOIS 



AND WISCONSIN xn^^a^^J 



1 



BY 



. Charles B. Cory 

 Curator of Department of Zoology. 



Chicago, U. S. A. 

 1909 



