The Complete Work of Charles Darwin Online

RECORD: Darwin, C. R. n.d. Under Variability I must allude to Dimorphism. CUL-DAR45.57. Edited by John van Wyhe (Darwin Online, http://darwin-online.org.uk/)

REVISION HISTORY: Transcribed by Christine Chua and edited by John van Wyhe 10.2022. RN1

NOTE: See record in the Darwin Online manuscript catalogue, enter its Identifier here. Reproduced with permission of the Syndics of Cambridge University Library William Huxley Darwin. The volume CUL-DAR45 contains notes for Natural selection chap. 4 'Variation under nature'.

[57]

Under Variability

I must allude to Dimorphism of Female Dytiscus & Hydroporus in sulcation & puncturing — Dimorphic female Libellula in colour & in shortness of wing (see Laws of variation) in being apterous see Westwood — There is case of Malayan male Beetles —~~is it that char~~

Walsh 8vo Pamph. (336) p. 222 many good cases of dimorphism in all orders given.—

[In Catalogue of Charles Robert Darwin's pamphlet collection: Quarto. CUL-DAR252.5: "336 Walsh on N. American neuroptera".]

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