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SUMMARYDrone-cell production reached its annual peak in April and May, in colonies building their own comb. The amount of drone comb they produced was controlled by the amount already present. The presence of an immature or adult queen stimulated worker-comb production; the absence of a queen did not stimulate drone-comb production, but the presence of occupied queen cells did so.
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J. B. Free (1967) studied this question.
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