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MONTHLY LETTER OF THE BUREAU OF ENTOMOLOGY | RE 
UNITED STATES DEPARTMENT OF ASC Dp 
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Number 225 4 Activities for December ees 1933 
(Not for publication) 
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D. L. VAN DINE HEADS DIVISION 
On February 15 D. L. Van Dine became the head of the Bureau's Di- 
vision of Fruit and Shade Tree Insects, the position made vacant Decem— 
ber $31, 1930, by the resignation of A. L. Quaintance.. Mr. Van Dine's 
experience in entomological work is indicated in. the following record: 
He was entomologist of the Hawaii Experiment Station from 1902 to 1909 
and organized and developed the work of this station on insects affect-— 
ing tropical crops and fruits. In the latter year he was transferred 
to the Bureau of Entomology and organized the work with the sugarcane 
insects at New Orleans, La. He resigned in 1910 to become entomologist 
of the experiment station of the Sugar Producers' Association at Rio 
Piedras, Puerto Rico. From 1913 to 1922 he was again in the Bureau in 
charge of research work in the biology and control of malarial mosqui- 
toes in the lower Mississippi Valley. During this period he took a fur-— 
lough for some 19 months (1918-19) to enter the service of the army as 
Captain in the Sanitary Corps, working on insects affecting troops. In 
1922 he accepted a position as extension specialist in entomology at 
Pennsylvania State College, resigning this position in 1924 to join the 
staff of the Tropical Plant Research Foundation and later to become the 
director of the Cuba Sugar Club experiment station under che Foundation, 
at Central Baragua, Cuba. The closing of this station on account of the 
economic situation in Cuba in 1932 made him available for return to this 
Bureau.--C. L. M, 
COTTON INSECTS 
Biology of pink bollworm.--S. L. Calhoun and L. C. Fife, Presidio, 
Tex., submit the following summary of a study begun August 5, 1932, and 
completed in December: "Normal long-cycle larvae (of Pectinophora gos— 
sypiella Saund.) appeared in open cotton bolls on August 25, at which 
time 12.34 per cent were of this type. The percentage of long—cycle lar- 
vae in open bolls reached a peak of 95.735 per cent on October 4. Im- 
mature larval stages were recorded in open bolls on August 5, shortly 
after the first open bolls appeared in the field. Immature third-—instar 
and fourth-instar larvae, which had been inactive for 60 to 70 days, re- 
sumed feeding and completed development when they were supplied with 
food and moisture and placed in a constant temperature of 80° F," 
Effects of flood on pink bollworm.--"The effects of two disastrous 
floods in the Presidio Valley upon the pink bollworm are discussed," by 
F. A. Fenton, and W. L. Owen, jr., Presidio, Tex. "It was found that where 
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