Silt 



THE OCCURRENCE OF 

 DISEASES OF ADULT BEES 



E. F. PHILLIPS 



Apiculturist 



UNITED STATES DEPARTMENT OF AGRICULTURE 

 DEPARTMENT CIRCULAR 218 



Contribution from the Bureau of Entomology 

 L. O. HOWARD, Chief 



Washington, D. C. 



Issued March, 1922. 



WA8HINQTON : GOVERNMENT PRINTINO OFFICE I 1028 



