. Bulletin of the Department of Agriculture. Agriculture. BULLETIN No. 345 Contribution from the Bureau of Entomology L. O. HOWARD, Chief. Washington, D. C. PROFESSIONAL PAPER February 5, 1916 NOTES ON THE PREOVIPOSITION PERIOD OF THE HOUSE FLY, MUSCA DOMESTICA L. By R. H. Hutchison, Scientific Assistant. CONTENTS. ;e. Introduction 1 The preoviposition period 3 Copulation 12 Page. Longevity 12 Summary 13 Literature cited 13 INTRODUCTION. During recent years a great deal of emphasis has been laid upon the use of flytraps as a means of reducing and controlling flies. The popularity
. Bulletin of the Department of Agriculture. Agriculture. BULLETIN No. 345 Contribution from the Bureau of Entomology L. O. HOWARD, Chief. Washington, D. C. PROFESSIONAL PAPER February 5, 1916 NOTES ON THE PREOVIPOSITION PERIOD OF THE HOUSE FLY, MUSCA DOMESTICA L. By R. H. Hutchison, Scientific Assistant. CONTENTS. ;e. Introduction 1 The preoviposition period 3 Copulation 12 Page. Longevity 12 Summary 13 Literature cited 13 INTRODUCTION. During recent years a great deal of emphasis has been laid upon the use of flytraps as a means of reducing and controlling flies. The popularity of trapping is based not only on the immediate results obtained, but also upon the claim that many female flies will be caught before they have laid their first eggs, and that thus the possi- ble number of future generations will be greatly reduced. For much the same reason it has been urged that trapping flies in the early spring is effective in reducing the number of future generations. An apparent justification for this method of control was found in the published records of experiments and observations indicating a rather long period of time between the emergence of the adult fly and the first deposition of eggs. Entomologists have been aware that these methods of control were founded upon a rather meager scientific basis. Comparatively few accurate data have been published bearing upon the length of the preoviposition period. The necessity of more data on this phase of the life history of the house fly was clearly pointed out by Dr. L. O. Howard (1911), and upon his suggestion work along these lines was begun during the season of 1913. The work has been carried out under the general direction of Mr. W. D. Hunter. A few experiments on the preoviposition period were carried out by the writer during the season of 1913 at Arlington, Va., and others during .the spring of Note.—This paper is intended for entomologists and others who are interested in the extermination of house
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