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In Lepidoptera among insects the evidence concerning castration tends to prove that hormones from the gonads play no part at all in the development of somatic sexual characters. Exper. Zool. Oudemans had previously obtained the same result in the Gipsy Moth, Limantria dispar.
Ingenhouz, Exper. on Air, p. 14.6. Jacquini hort. botanic. Vindeb.
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