ORGANIZATION OF THE UNITED STATES DEPARTMENT OF AGRICULTURE 

 WHEN THIS PUBLICATION WAS LAST PRINTED 



Secretary of Agriculture Henry A. Wallace. 



Under Secretary Rexford G. Tugwell. 



Assistant Secretary M. L. Wilson. 



Director of Extension Work C. W. Warbukton. 



Director of Personnel W. W T . Stockbeeger. 



Director of Information M. S. Eisenhower. 



Director of Finance W. A. Jump. 



Solicitor Mastin G. White. 



Agricultural Adjustment Administration Chester C. Davis, Administrator. 



Bureau of Agricultural Economics A. G. Black, Chief. 



Bureau of Agricultural Engineering S. H. McCrory, Chief. 



Bureau of Animal Industry John R. Mohler, Chief. 



Bureau of Biological Survey J. N. Darling, Chief. 



Bureau of Chemistry and Soils H. G. Knight, Chief. 



Bureau of Dairy Industry O. E. Reed, Chief. 



Bureau of Entomology and Plant Quarantine- Lee A. Strong, Chief. 



Office of Experiment Stations James T. Jardine, Chief. 



Food and Drug Administration Walter G. Campbell, Chief. 



Forest Service Ferdinand A. Snxox. Chief. 



Grain Futures Administration J. W. T. Duvel, Chief. 



Bureau of Home Economics Louise Stanley, Chief. 



Library Claribel R. Barnett, Librarian. 



Bureau of Plant Industry Frederick D. Richey, Chief. 



Bureau of Public Roads Thomas H. MacDonald, Chief. 



Soil Conservation Service H. H. Bennett, Chief. 



Weather Bureau Willis R. Gregg, Chief. 



This circular is a contribution from 



Bureau of Entomology and Plant Quarantine- Lee A. Strong, Chief. 



Division of Fruit Insects D. L. Van Dine, Principal Ento- 



mologist, in Charge. 



20 



U. S. GOVERNMENT PRINTING OFFICE: 1335 



For sale by the Superintendent of Documents, Washington, D. C. Price 5 cents 



