EIGHTEENTH REPORT 
OF THE 
STATE ENTOMOLOGIST 
ON THE 
NOXIOUS AND BENEFICIAL INSECTS 
OF THE 
STATE OF ILLINOIS. 
SEVENTH REPORT OF -S. A. FORBES. 
For the Years 1891 and 1892 . 
SPRINGFIELD, ILL. 
H. W. Rokker, State Printer and Binder, 
1894. 
