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Number 204 


MONTHLY LETTER OF THE BUREAU ENTOM@EOGYS FR A RY 
~ UNITED STATES DEPARTMENT OF AGRIGULRUREE!V EDO 
% JUNI 1931 *% 




TRUUK CROP INSECTS 
W. H. White, Entomologist 
D. E. Fink, Entomologist in charge of the insecticide laboratory 
at Philadelphia, Pa., visited Washington, April 6 and 7, to confer with 
Bureau officials in regard to the proposed transfer of his laboratory 
from Philadelphia, Pa., to Takoma Park, Md. 
J. E. Dudley, Entomologist in charge of the field laboratory at 
Madison, Wis., was also a visitor in Washington, April 8 to 10, and 
while here went over his work on the ecological phases of the pea aphid 
and discussed future plans for the investigations. 
Cc. F. Stahl, Entomologist in charge of the field laboratory at 
Sanford, Fla., in company with Dr. Dayton Stoner, Field Assistant at 
that laboratory, visited Washington during the period April 20 to 26. 
Dr. Stoner has been engaged for the past three seasons on a study of 
the relation of migratory and other birds tc the celery leaf-tier. His 
temporary appointment terminated April 14. The primary object of Mr. 
Stahl's visit was to discuss, in company with Dr. Stoner and Bureau 
officials, the publication of the results of this work and also the 
work which has been done during the past few years on the control of 
the celery leaf—tier and other celery pests. 
? 
On April 23 R. E. Campbell and M. W. Stone, of the Alhambra, Calif., 
field laboratory, had charge of two demonstrations on methods of wirewornm 
control under the auspices of the Ventura County, Calif., Extension 
Service. 
Die F. R. Petherbridge, Cambridge, England, was a visitor at the 
Alhambra, Calif., laboratory on April 25. 
R. H. Davidson and F. W. Fletcher have been appointed as Agents 
and assigned to duty at Columbus, Ohio, to assist with the Mexican bean 
beetle project. | 
The following field assistants have been appointed: H. G. Bergen, 
Twin Falls, Idaho; D. H. Brannon, Walla Walla, Wash.; H. L. Dees, Picayune, 
Miss.; and E. C. Murdock, Grand Junction, Colo. 

