Results of his breeding have not borne out his opinion that females are more numerous in Lepidoptera [see Descent 1: 313]. Still convinced he is right, suggests only way to settle question is by controlled breeding of large numbers of each species.
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The Charles Darwin Collection
The Darwin Correspondence Project is publishing letters written by and to the naturalist Charles Darwin (1809–1882). Complete transcripts of letters are being made available through the Project’s website (www.darwinproject.ac.uk) after publication in the ongoing print edition of The Correspondence of Charles Darwin (Cambridge University Press 1985–). Metadata and summaries of all known letters (c. 15,000) appear in Ɛpsilon, and the full texts of available letters can also be searched, with links to the full texts.
Results of his breeding have not borne out his opinion that females are more numerous in Lepidoptera [see Descent 1: 313]. Still convinced he is right, suggests only way to settle question is by controlled breeding of large numbers of each species.