MONTHLY LETTER OF THE BUREAU OF ENTO 
MOLOGY 
UNITED STATES DEPARTMENT OF AGRICULTURE 
>> 
Number 80 December, 1920 
a ppg ey 
STORED PRODUCT INSECT INVESTIGATIONS 
E. A. Back, Entomologist in Charge 
Perez Simmons has been transferred from Alhambra, Calif., where 
he has been assisting A. 0. Larson in bean weevil investigations, to 
Washington, D. C., for a general assignment, 
A. O. Larson and Perez Simmons have submitted for publication a 
technical paper dealing with the biology of the four-spotted bean weevil, 
Bruchus quadrimaculatus. 
S. EH. McClendon, of Thomasville, Ga., has recently been on leave in 
Louisiana, 
J. C. Bridwell left Washington, December 2, for the Southwest, where 
he will investigate the possibility of introducing into Hawaii certain 
predacious and parasitic enemies of Bruchidae. 
D. B. Mackie, chief quarantine officer of the California Department 
of Agriculture, has recently been appointed collaborator with this Bureau. 
Mr. Mackie’s efforts along the line of vacuum fumigation with carbon disul- 
phid for the treatment of insects attacking dried fruits and vegetables 
have had most practical results. He has been instrumental in installing 
fumigators with the Peach and Fig Growers’ Association and is now negotiat- 
ing with the Associated Raisin Growers to treat all their products, which 
this year amount to sixty million dollars worth of stock. Outfits installed 
in Oregon are operating most satisfactorily, according to Mr. Mackie. 
He is also at work upon plans for fumigators for the Canadian Government, 
Hawaiian Board of Agriculture and Forestry, and for the Entomological 
Department of the Union of South Africa. 
This branch has now moved from its old quarters in the Council 
of National Defense Building, 18th and D Sts., N. W., to the old Army 
Medical Building known now as "Building F", 7th and B Sts., N. W. 
SOUTHERN FIELD CROP INSECT INVESTIGATIONS 
J. L. Webb, Entomologist Acting in Charge 
B, R. Coad was in Washington at the close of November and beginning 
of December. In company with Dr. Howard he made a trip to New York to at- 
tend a meeting of manufacturers of insecticide and insecticide machinery 
for the purpose of discussing problems concerning the manufacture, distri- 
bution, and use of calcium arsenate in the control of the boll weevil. 
The motion picture illustrating the methods advocatei by the bureau for the 
control of the weevil was shown. 

