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Chant (1956) has shown that spiders are common predators in apple orchards in southeast England. Dondale (1956) listed the species of spiders found in Nova Scotia orchards. This is a note on population densities in the latter orchards from 1953 to 1956. The sampling device used in this study was a cloth-covered, yard-square tray (Lord, 1956), supplemented in a minor way by a collecting umbrella. Each tray or umbrella collection represented the spiders jarred from the lower branches of a single tree, or from the lower branches of half of each of two trees.
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C. D. Dondale (1958) studied this question.
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