RECORD: Darwin, C. R. 'I have been watching black Aphis on Dock tended by reddish Myrmica' (6.1858) CUL-DAR205.11.89 Transcribed by Kees Rookmaaker (Darwin Online, http://darwin-online.org.uk/)
REVISION HISTORY: Transcribed by Kees Rookmaaker, corrections and edited by John van Wyhe 11.2010. RN1
NOTE: This note was written eight days after Darwin received the famous letter and essay from Alfred Russel Wallace.
Editorial symbols used in the transcription:
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Reproduced with permission of the Syndics of Cambridge University Library and William Huxley Darwin.
June 26 - 27 /1858/
I have been watching black Aphis on Dock tended by reddish Myrmica. — I removed all the ants & stopped their return by tree for few hours; then I watched them for long time & tickled the, with human hairs fixed to handle, but then not one excreted. Then I put some Myrmica on from adjoining twig: they immediately fingered them & stroked their abdomen with their antennae walking over their backs, & dozens soon [4 words illeg] secreted their globules of [sap], which was greedily devoured. The Aphides clearly lifted their abdomen towards ants mouth. Is it a convenience to be relieved of these viscid secretions. The whole seemed intentional, for without exception they secreted just in front of ant mouth; i e the [active] one which was being carefree secreted, but sometimes an
[sentence breaks off]
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Citation: John van Wyhe, editor. 2002-. The Complete Work of Charles Darwin Online. (http://darwin-online.org.uk/)
File last updated 2 July, 2012