U. S. DEPARTMENT OF AGRICULTURE, 



BUREAU OF ENTOMOLOGY— BULLETIN No. 98. -'iO> 



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



4.4 



HISTORICAL NOTES ON THE CAUSES 



OF BEE DISEASES. 



E. F. PHILLIPS, Ph. D., 



In Charge of Bee Culture, 



AND 



G. F. WHITE, Ph. D., M. D., 



Expert in Bacteriology. 



Is.suED March 26, 1912. 



0mu'i' 



WASHINGTON: 



GOVERNMENT PRINTING OFFICE. 



1912. 



