ORGANIZATION OF THE UNITED STATES DEPARTMENT OF AGRICULTURE 

 WHEN THIS PUBLICATION WAS LAST PRINTED 



Secretary of Agriculture Arthur M. Hyde. 



Assistant Secretary R. W. Dunlap. 



Director of Scientific Work A. F. Woods. 



Director of Regulatory Work Walter G. Campbell. 



Director of Extension Work C. W. Warbtjrton. 



Director of Personnel and Business Adminis- W. W. Stockberger. 

 tration. 



Director of Information M. S. Eisenhower. 



Solicitor E. L. Marshall. 



Bureau of Agricultural Economics Nils A. Olsen, Chief. 



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



Bureau of Animal Industry John R. Mohler, Chief. 



Bureau of Biological Survey Paul G. Redington, Chief. 



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



Office of Cooperative Extension Work C. B. Smith, Chief. 



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



Bureau of Entomology C. L. Marlatt, Chief. 



Office of Experiment Stations James T. Jardine, Chief. 



Food and Drug Administration Walter G. Campbell, Director of 



Regulatory Work, in Charge. 



Forest Service R. Y. Stuart, 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 William A. Taylor, Chief. 



Bureau of Plant Quarantine Lee A. Strong, Chief. 



Bureau of Public Roads Thomas H. MacDonald, Chiel 



Weather Bureau Charles F. Marvin, Chief. 



This bulletin is a contribution from 



Bureau of Entomology C. L. Marlatt, Chief. 



Division of Cereal and Forage Insects___ W. H. Larrimer, Principal Ento- 

 mologist, in Charge. 



U. S. GOVERNMENT PRINTING OFFICE: 1932 



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



