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ANNUAL ROLL CALL ~— AMERICAN RED CROSS 
The annual membership roll call of the American Red Cross will 
take place during the period from November 11 to 26. The facilities 
of this splendid organization are being utilized to relieve distress 
throughout the country on a scale never previously attempted. 
To continue this work and to provide for the regular activities 
of disaster relief, assistance to service men and veterans, public health 
nursing, etc., requires the support of all our people. The employees of 
the Department of Agriculture have always responded generously to such 
appeals and I urge them to give increased support to this most urgent 
plea. 
Arthur M. Hyde, 
secretary. 
TOXICOLOGY AND PHYSIOLOGY OF INSECTS 
Organic compounds of sulphur show insecticidal value.--F. L. Camp- 
bell and W. N. Sullivan, Takoma Park, Md., in a summary of results of 
their tests against mosquito larvae of organic compounds containing sul- 
phur, state that "Of 17 organic compounds containing sulphur that were 
tested against mosquito larvae, 4 were found to be more toxic than nic— 
otine: i. e., 2-phenyltetramethylene-1,3-disulfide, phenylacetimido 
thiophenyl ether hydrochloride, benzimido thiophenyl ether hydrochloride, 
and diphenyl sulphone." 
BEE CULTURE 
Apparently more profitable to feed bees honey than sugar sirup.-— 
Seme interesting facts on apiary management are reported by G. E. Marvin, 
Somerset, Md.: "One large beekeeper spends many hours in the fall and 
the spring feeding sugar sirup to bring the colonies up to strength for 
the honey flow, after having taken away too much honey to be extracted. 
Another cooperator in the same State puts down into the brood nest 6 or 
7 frames of honey from the last super and, although he lowers his yield, 
he avoids sirup feeding and thereby lowers the cost of production con— 
siderably over that of the beekeeper who does the feeding. It appears 
more profitable to follow the latter procedure of saving out frames of 
honey for bees than to feed sugar sirup, even though the honey saved 
is from the main honey flow." 
MONTHLY LETTER OF THE BUREAU OF ENTOMOLOGY. | © | “* 
UNITED STATES DEPARTMENT OF AGRICULTURE" E CEIVED 
Number 222 Activities for September Getcber! 1932: 
1932 * 
a7) £517, of Asrionltur 
(Not for publication) SS a 
