The present investigations were begun by C. A. Weigel, of the Bureau of Entomology, assisted by C. A. Bennett, who conducted a large part of the field work during the first ;.ally all the biological work was done at Orlando, Fla., by the junior \\Titer, together with observations made at "the camphor farm at Satsuma, Fla. The control work was done mostly on the camphor plantation at Satsuma, and in addition pruning and spraying experiments were carried on at Orlando. Similar life-histor\ was carried on at Gainesville, Fla., by Prof. J. R. Watson, to whom credit is given for certain notes and valuable assistance. The writers desire also to express their appreciation to C. W. Loveland. manager of the camphor plantation at Satsuma throughout the period of the investigations, who extended to toeni many courtesies as well as material aid dming the progress of the work.
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