May, 1958 
Urbana, Illinois 
BULLETIN 
of the 
ILLINOIS NATURAL HISTORY SURVEY 
HARLOW B. MILLS, Chief 
Contents and Index 
Volume 26 
1953-1955 
Printed by Authority of the 
S LAst Bee LY btn ers 
WILLIAM G. STRATTON, Governor 
DEPARTMENT OF REGISTRATION AND EDUCATION 
VERA M. BINKS, Director 
NATURAL 
win 19 1958 HISTORY SIIRVEY 
