THE INSECT PEST SURVEY 
BULLETIN 
A periodica! review of entomological conditions throughout the United States 
issued on the first of each month from March to December, inclusive. 
Volume 11 August 1, 1931. Number 6 
BUREAU OF ENTOMOLOGY 
UNITED STATES 
DEPARTMENT OF AGRICULTURE 
AND 
THE STATE ENTOMOLOGICAL 
AGENCIES COOPERATING 
