ORGANIZATION OF THE UNITED STATES DEPARTMENT OF AGRICULTURE 
WHEN THIS PUBLICATION WAS LAST PRINTED 
Seerehary- of Agriculture. (2. eee, Henry A. WALLACE. 
Wider SCChCLONY sao ao sae ee M. L. Witson. 
VASSUSTANE DCChELOTY — = tein ie tt Harry L. Brown. 
Director of Extenston Work____._..__-_---- C. W. WARBURTON. 
Director Of Pin ance 225 2 2a ae ee ee W. A. Jump. 
Director of Information. ___._____--_--___- M. 8S. EISENHOWER. 
DUeCLoT 0} Jerson nel a= ee aa, ens Ae W. W. STOCKBERGER. 
Director Of IeCSCOnCl a= aes 22 ee JAMES T. JARDINE. 
SOLLCOLON 3c) en a Ne Annan oe ne Seas ae ee cee Mastin G. WHITE. 
Agricultural Adjustment Administration _____ H. R. Totiey, Administrator. 
Bureau of Agricultural Economics________ ~~ A. G. Buack, Chief. 
Bureau of Agricultural Engineering_____---- S. H. McCrory, Chief. 
Bureau of Animal Industry_..-.....------- JoHN R. MoutER, Chief. 
Bureau of Biological Survey_______.------- Ira N. GABRIELSON, Chief. 
Bureau of Chemistry and Soils___________ ~~ Henry G. Knicut, Chief. 
Commodity Exchange Administration.___._ ~~ J. W. T. Duvet, Chief. 
Bureau of Dairy Industry. == O. E. Resp, Chief. 
Bureau of Entomology and Plant Quarantine. Lnn A. Strona, Chief. 
Office of Experiment Stations_......_._.-___- James T. JARDINE, Chief. 
Farm Security Administration____---------- W. W. ALEXANDER, Administrator. 
Food and Drug Administration____._______- WaLTEeR G. CAMPBELL, Chief. 
TOR CSG (SERUUCEL ott eS i, Bn AN oe FERDINAND A. Srucox, Chief. 
Bureau of Home Economics___.----.------- Louise STANLEY, Chief. 
COV AGE r= te whe Ns SOE ee Tae ey ee ye CLARIBEL R. Barnett, Librarian. 
Bureau of Plant Indusiry_...-....----_--- E. C. Aucutsr, Chief. 
Burcaw of Pubite Roadsea. =) =. 2) ee Tuomas H. MacDona.tp, Chief. 
Soil Conservation Service.____.___---------- H. H. Bennett, Chief. 
Weather bureaus == 22 a ee Wiuuis R. Greaa, Chief. 
This publication is a contribution from 
Bureau of Entomology and Plant Quarantine__ LrE A. STRONG, Chief. 
Division of Insect Identification__________. C. F. W. MurEsEseck, Principal 
Entomologist, in Charge. 
172 
U.S. GOVERNMENT PRINTING OFFICE: 1938 
For sale by the Superintendent of Documents, Washington, D.C. - - - = - - Price 20 cents 
