ORGANIZATION OF THE 

 UNITED STATES DEPARTMENT OF AGRICULTURE. 



October 24, 1923. 



Secretary of Agriculture Henry C. Wallace. 



Assistant Secretary Howard M. Gore. 



Director of Scientific Work E. D. Ball. 



Director of Regulatory Work Walter G. Campbell. 



Director of Extension Work O. W. Warbtjrton. 



Solicitor R. W. Williams. 



Weather Bureau Charles F. Marvin, Chief. 



Bureau of Agricultural Economics Henry C. Taylor, Chief. 



Bureau of Animal Industry John R. Mohler, Chief. 



Bureau of Plant Industry William A. Taylor, Chief. 



Forest Service W. B. Greeley, Chief. 



Bureau of Chemistry C. A. Browne, Chief. 



Bureau oflSoils Milton Whitney, Chief. 



Bureau of Entomology L. O. Howard, Chief. 



Bureau of Biological Survey E. W. Nelson, Chief. 



Bureau of Public Roads Thomas H. MacDonald, Chief. 



Bureau of Home Economics Louise Stanley, Chief. 



Office of Experiment Stations E. W. Allen, Chief. 



Fixed Nitrogen Research Laboratory F. G. Cottrell, Director. 



Publications L. J. Haynes, in Charge. 



Library ClaribelR. Barnett, Librarian. 



Federal Horticultural Board C. L. Marlatt, Chairman. 



Insecticide and Fungicide Board J. K. Haywood, Chairman. 



Packers and Stockyards Administration 1 Chester Morrill, Assistant to the 



Grain Futures Admmistration f Secretary. 



This bulletin is a contribution from 



Bureau of Entomology L. O. Howard, Chief. 



Forest Insect Investigations F. C. Craighead, Entomologist in 



Charge. 

 20 



ADDITIONAL copies 



OF THIS PUBLICATION MAT BE PROCUEED FEOM 



THE SUPERINTENDENT OF DOCUMENTS 



GOVERNMENT PRINTING OFFICE 



WASHINGTON, D. C. 



AT 



10 CENTS PER COPY 



V 



