STATE OF ILLINOIS 

 DEPARTMENT OF REGISTRATION AND EDUCATION 



NATURAL HISTORY SURVEY DIVISION 



STEPHEN A. FORBES. Chief 



Bulletin 



OF THE 



Illinois State Natural History 



Survey 



URBANA, ILLINOIS, U. S. A. 



VOLUME XV 

 1924-1925 



PRINTED BY THE AUTHORITY OF THE STATE OF ILLINOIS 



1926 



