—— 
STATE OF ILLINOIS 
DEPARTMENT OF REGISTRATION AND EDUCATION 
NATURAL HISTORY SURVEY DIVISION 
STEPHEN A. FORBES, Chier 
BULLETIN 
OF THE 
Illinois State Natural History 
Survey 
URBANA, ILLINOIS, U. S. A. 
VOLUME XIV 
1921—1923 
PRINTED BY AUTHORITY OF THE STATE OF ILLINOIS 
1925 
