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Abstract

Preliminary work was conducted along two major lines: 1. Survey of Drosophila species. Trapping records were kept for three large study areas in the Jackson Hole region. Sites within these areas were chosen to coincide with the trapping sites of previous investigators when this was feasible. 2. Survey of Drosophila populations on Signal Mountain. A continuing record of the numbers and kinds of flies was kept for some thirty sites from the base of the mountain to the summit. These records were obtained for dates through June, July and August. Project Number 151.

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