U. S. DEPARTMENT OF AGRICULTURE, 



BUREAU OF ENTOMOLOGY— BULLETIN No. 98. 



L. O. HOWARD. Entomologist and Chief of Bureau. 



HISTORICAL NOTES ON THE CAUSES 

 OF BEE DISEASES. 



E. F. PHILLIPS, Pii. D., 



In Charge of Bee Culture, 



AND 



G. F. WHITE, Pn. D., U. D., 



Expert in Bacteriology. 



Issued March 26, 1912. 



WASHINGTON: 



GOVERNJIENT PRINTING OFFICE. 



1912. 



