RECORD: Darwin, C. R. 1841.06-07.04. Are there many flower-feeding Flies?? CUL-DAR46.2.C12-C13. Edited by John van Wyhe (Darwin Online, http://darwin-online.org.uk/)

REVISION HISTORY: Transcribed by Christine Chua and edited by John van Wyhe 8.2022. RN1

NOTE: See record in the Darwin Online manuscript catalogue, enter its Identifier here. Reproduced with permission of the Syndics of Cambridge University Library and William Huxley Darwin. The volume CUL-DAR46.2 contains Notes for Natural selection.


[C12]

Maer June. /41/ Are there many flower-feeding Flies??—

Saw a fly (2.) go to several of Lychnis dioica  Bees also go & afterwards to several of the Prunella (?) Ajuga & I think it passed over other flowers — I have since repeatedly seen this fly on the Ajuga There were many of these flies at work.— I then caught Fly (1) — on Lychnis dusted with its pollen & afterwards I saw others of same kind on a Daisy & others on common Stellaria, I have since seen many of them on Thyme &c &c— both profusely dusted all tarsi, having legs, body, base of sucker & antennæ — These flowers I had before remarked as never, as I thought visited by any insects.—

I also caught Syrphus on Butter cup—passing covered with pollen.— Again I saw same three kind of flies at work on many flowers, especially the Prunella common Ajuga.— Also, I saw fly (3) dusted with Lychnis pollen & again several fly (2.)

Caught white Butterfly on Dandelion, dusted with pollen on belly & legs.

Mem. How numerous Hymenoptera on Umbelliferous — Samiculæ is dioecious Umbelliferous.

[C13]

Saw fly (4) flying from one to other flower of marsh Mysiotis, with regularity of Bees, (wh. it so much resembles) & pushing in long proboscis in doing which it must be dusted with its excessively much pollen.—

Humble also frequent this flower = Flies haunt Compositae much.=

Shrewsbury July 4th 41. Saw Syrphus flying from flower to flower of Helianthemum, with precision of Bee


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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 28 August, 2023