RECORD: Darwin, C. R. [1868]. [ratio of males to females]. CUL-DAR81.81. Edited by John van Wyhe (The Complete Work of Charles Darwin Online, http://darwin-online.org.uk/)

REVISION HISTORY: Transcribed and edited by John van Wyhe 8.2025. RN1

NOTE: See record in the Darwin Online manuscript catalogue, enter its Identifier here. Reproduced with permission of the Syndics of Cambridge University Library and William Huxley Darwin. The volumes CUL-DAR80-86 contain material for Darwin's book Descent of man (1871).

81

 ♂     ♀     ♂      ♀
1047 : 1561 : : 100 : 149
♂     ♀     ♂     ♀
1307 : 1868 : : 100 : 143
♂     ♀     ♂    ♀
189 : 141 : : 100 : 74
If precise part for number for every 100 ♀ Butterflies there must be 149 ♂

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Citation: John van Wyhe, ed. 2002-. The Complete Work of Charles Darwin Online. (http://darwin-online.org.uk/)

File last updated 13 August, 2025