Issued May 23, 1911. 
(essere lake MENT OF AGRICULTURE. 
FARMERS’ BULLETIN 447. 
Sok ten 
BY 
Be PAIS; a. D. 
In Charge of Bee Culture, Bureau of FE-:ntomology. 
WASHINGTON: 
GOVERNMENT PRINTING OFFICE. “ 2] 163) 
1911. 
