4 NEW YORK STATE MUSEUM 



method of controlling this pest, after it had become well estab- 

 lished in a vineyard. The breeding cage and other office experi- 

 ments have been conducted under the writer's direction by his 

 first assistant, Mr 0. M. Walker, aided by the second assistant, 

 Mr D. B. Young. The author is also under obligations to 

 Prof. Percy J. Parrott, entomologist of the Ohio Agricultural 

 Experiment Station, and Prof. A. F. Burgess, chief San Jos6 

 scale inspector of Ohio, who kindly accompanied him in his 

 investigation of conditions in that state in 1902 and supplied 

 additional information in 1903. 



E. P. Felt 

 Albany N. Y. September 1903 



