ORGANIZATION OF THE UNITED STATES DEPARTMENT OF AGRICULTURE 

 WHEN THIS PUBLICATION WAS LAST PRLNTED 



Secretary of Agriculture Heney A. Wallace. 



Under Secretary Rexfoed G. Tugwell. 



Assistant Secretary M. L. Wilson. 



Director of Extension Work C. W. Waebubton. 



Director of Personnel W. W. Stockbebgee. 



Director of Information M. S. Eisenhoweb. 



Director of Finance W. A. Jump. 



Solicitor Mastin G. White. 



Agri-cultural Adjustment Administration Chestee C. Davis, Administrat or. 



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



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



Bureau of Animal Industry John R. Mohlee, 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. Steong, Chief. 



Office of Experiment Stations James T. Jaedine, Chief. 



Food and Drug Administration Waltee G. Campbell, Chief. 



Forest Service Febdinand A. Silcox, Chief. 



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



Bureau of Home Economics Louise Stanley, Chief. 



Library Claeibel R. Babnett, Librarian. 



Bureau of Plant Industry Feedeeick D. Richey, Chief. 



Bureau of Public Roads Thomas H. MacDonald, Chief. 



Soil Conservation Service H. H. Bennett, CMef. 



~\Yeather Bureau Willis R. Geegg, Chief. 



This bulletin is a contribution from 



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

 Division of Truck Crop and Garden Insect In- 

 vestigations W. H. White, Principal Ento- 

 mologist, in charge. 



Division of Insecticide Investigations R. C. Roaek, Principal chemist, 



in charge. 



10 



U. S. GOVERNMENT PRINTING OFFICE: 1935 



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



