ORGANIZATION OF THE UNITED STATES DEPARTMENT OF AGRICULTURE 

 WHEN THIS PUBLICATION WAS LAST PRINTED 



Secretary of Agtieulture Henky A. Waixace. 



Under Secretanj Rexpord G. Tugweu,. 



Assistant Secretary M. L. Wilson. 



Director of Extension ll'orfc C. W. Wakbueton. 



Director of Finance W. A. Jump. 



Director of Information M. S. Eisenhower. 



Director of Personnel W. W. Stockberger. 



Director of Research James T. Jabdine. 



Solicitor Mastin G. White. 



Agricultural Adjustment Administration H. R. Tot.t.ey, Administrator. 



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



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



Bureau of Animal Industrij John R. Mohler, Chief. 



Bureau, of Biological Suriey Ira N. Gabrielson, Chief. 



Bureau of Chemistry and Soilx Hexrt G. Knight, Chief. 



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



Bureau of Entomology and Plant Quarantine^ Leb A. Strong, Chief. 



Office of Experiment Stations Jambs T. Jardine. Chief. 



Food and Drug Administration Walteh G. CAMPBEai, Chief. 



Forest Service Fiedinand A. Silcox, Chief. 



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



Bureau of Borne Economics Louise Stani,et, Chief. 



Library Clabibel R. Barnbtt, Librarian. 



Bureau of Plant Industry Feederick D. Kichet, Chief. 



Bureau of Public Roads Thomas H. JIacDonald, Chief. 



Soil Conservation Service H. H. Bennett, Chief. 



Weather Bureau • Wiujs R. Geegg, Chief. 



This circular is a contribution from 



Bureauof Entomology and Plant Quarantine Lee A. Stkong, Chief. 



Division of Bee Culture J. I. Hambleton, Principal Apv- 



culturist, in charge. 



35 



. ±>. GOVERNMENT PRINTING OTFICE: I93E 



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