63 0, af $ | 
Woo OEP ART MENT ORJMAGRICULTURE: i 
DIVISION OF ENTOMOLOGY. , 
BULLETIN. No, 22. 
ey Eee OR ES 
OF 
OBSERVATIONS AND EXPERIMENTS 
THE PRACTICAL WORK OF THE DIVISION, 
MADE 
UNDER THE DIRECTION GF THE ENTOMOLOGIST. 
(PUBLISHED BY THE AUTHORITY OF THE SECRETARY OF AGRICULTURE.) 
WASHINGTON: 
GOVERNMENT PRINTING OFFICE. 
1890. 
