'■ 
THE INSECT PEST SURVEY 
BULLETIN 
A periodical review of entomological conditions throughout the United State* 
issued on the first of each month from March to December, inclusive. 
Volume 11 1931 Index 
BUREAU OF ENTOMOLOGY 
UNITED STATES 
DEPARTMENT OF AGRICULTURE 
AND 
; THE STATE ENTOMOLOGICAL 
AGENCIES COOPERATING 
UBRARY 
STATE PtANT BOARD 
