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To Roland Trimen   21 February [1868]

Summary

RT’s argument about the Lasiocampa strikes him as very good; asks for any similar cases. Wonders whether male butterflies may serve more than one female.

Author:  Charles Robert Darwin
Addressee:  Roland Trimen
Date:  21 Feb [1868]
Classmark:  Royal Entomological Society (Trimen papers, box 21: 65)
Letter no:  DCP-LETT-5908

To Roland Trimen   [16 March 1868]

Summary

Asks whether RT will call.

Author:  Charles Robert Darwin
Addressee:  Roland Trimen
Date:  [16 Mar 1868]
Classmark:  Royal Entomological Society (Trimen papers, box 21: 66)
Letter no:  DCP-LETT-6015

From Roland Trimen   20 March [1868]

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Summary

On attraction of males by females in moths. H. T. Stainton mentions a case.

Author:  Roland Trimen
Addressee:  Charles Robert Darwin
Date:  20 Mar [1868]
Classmark:  DAR 86: A92–3
Letter no:  DCP-LETT-6030

To Roland Trimen   [21 March 1868]

Summary

Arranges for RT to call.

Author:  Charles Robert Darwin
Addressee:  Roland Trimen
Date:  [21 Mar 1868]
Classmark:  Royal Entomological Society (Trimen papers, box 21: 67)
Letter no:  DCP-LETT-6035

From Roland Trimen   26 March 1868

Summary

Coloration in moths.

Quotes Achille Guénée on relative proportion of sexes in Phalaenites.

Author:  Roland Trimen
Addressee:  Charles Robert Darwin
Date:  26 Mar 1868
Classmark:  DAR 81: 76, DAR 85: B61–2, DAR 84.1: 134–5
Letter no:  DCP-LETT-6055

To Roland Trimen   27 March [1868]

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Summary

Thanks RT for letter which saves him from a "terrible mistake": that no moths were more brilliantly coloured beneath than above. Suggests revised version for comment. [See Descent 1: 397.]

Author:  Charles Robert Darwin
Addressee:  Roland Trimen
Date:  27 Mar [1868]
Classmark:  DAR 82: A119–20
Letter no:  DCP-LETT-6060

From Roland Trimen   27 March 1868

Summary

Approves CD’s revision on coloration of moths.

Impressed with apparent adverse tendencies: one toward sexual selection, the other toward protection.

Author:  Roland Trimen
Addressee:  Charles Robert Darwin
Date:  27 Mar 1868
Classmark:  DAR 82: A120v
Letter no:  DCP-LETT-6061

From Roland Trimen   13 April 1868

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Summary

Extract from Émile Blanchard’s Metamorphoses, moeurs et instincts des insectes [1868], on attraction of males by female Lepidoptera, and possible explanation.

Author:  Roland Trimen
Addressee:  Charles Robert Darwin
Date:  13 Apr 1868
Classmark:  DAR 85: B50–1
Letter no:  DCP-LETT-6116

To Roland Trimen   14 April [1868]

Summary

Has tried using dealers’ price-lists as a guide to sex ratios in Lepidoptera; finds numerous cases in which the sexes bring different prices and in virtually all of them the males are cheaper. This seems to confirm the impression of the field collectors.

Wishes RT good luck with natural history in S. Africa.

Author:  Charles Robert Darwin
Addressee:  Roland Trimen
Date:  14 Apr [1868]
Classmark:  Royal Entomological Society (Trimen papers, box 21: 68)
Letter no:  DCP-LETT-6117

From Roland Trimen   18 November 1869

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Summary

Thanks CD for his orchid paper ["Fertilization of orchids", Collected papers 2: 138–56]. Comments briefly on orchids.

Discusses moths in which the wing underside is the most brightly coloured, and relates his observations on sexual selection by a moth, Syntomis.

Author:  Roland Trimen
Addressee:  Charles Robert Darwin
Date:  18 Nov 1869
Classmark:  DAR 82: 27–9
Letter no:  DCP-LETT-6995

From Roland Trimen   17 and 18 April 1871

Summary

Man’s spiritual life separates him from other animals.

Why are moths attracted, often fatally, to lights?

Thanks for copy of Descent.

Author:  Roland Trimen
Addressee:  Charles Robert Darwin
Date:  17 and 18 Apr 1871
Classmark:  DAR 178: 187
Letter no:  DCP-LETT-7692

To Roland Trimen   24 May [1871]

Summary

Cannot explain why moths fly into candle flames and birds against lighthouses. Has felt it was just curiosity which attracted them.

CD does believe dogs have some sense of humour.

Author:  Charles Robert Darwin
Addressee:  Roland Trimen
Date:  24 May [1871]
Classmark:  Royal Entomological Society (Trimen papers, box 21: 69)
Letter no:  DCP-LETT-7880

From Roland Trimen   26 July 1871

Summary

Hopes to visit during CD’s stay at Haredene.

Author:  Roland Trimen
Addressee:  Charles Robert Darwin
Date:  26 July 1871
Classmark:  DAR 178: 188
Letter no:  DCP-LETT-7883

To Roland Trimen   27 July 1871

Summary

Invites RT to call on him while he is staying at Haredene.

Author:  Charles Robert Darwin
Addressee:  Roland Trimen
Date:  27 July 1871
Classmark:  Royal Entomological Society (Trimen papers, box 21: 70)
Letter no:  DCP-LETT-7884

From Roland Trimen   [21] August [1871]

Summary

Intends to visit CD at Haredene.

Author:  Roland Trimen
Addressee:  Charles Robert Darwin
Date:  [21] Aug [1871]
Classmark:  DAR 178: 189
Letter no:  DCP-LETT-7915

From Emma Darwin to Roland Trimen   [22 August 1871]

Summary

CD is very unwell; will be unable to see RT.

Author:  Emma Wedgwood; Emma Darwin
Addressee:  Roland Trimen
Date:  [22 Aug 1871]
Classmark:  Royal Entomological Society (Trimen papers, box 21: 71)
Letter no:  DCP-LETT-7916

From Roland Trimen   20 September 1871

Summary

On St G. J. Mivart’s Genesis of species and Chauncey Wright’s review of it [North Am. Rev. (July 1871)].

Author:  Roland Trimen
Addressee:  Charles Robert Darwin
Date:  20 Sept 1871
Classmark:  DAR 178: 190
Letter no:  DCP-LETT-7956

To Roland Trimen   13 November [1871]

Summary

Regrets he is too unwell to see RT before his departure for the Cape; wishes him well.

Author:  Charles Robert Darwin
Addressee:  Roland Trimen
Date:  13 Nov [1871]
Classmark:  Royal Entomological Society (Trimen papers, box 21: 72)
Letter no:  DCP-LETT-8064

From Roland Trimen   13 April 1872

Summary

On new [6th] edition of the Origin; comments on additions.

Owen’s attitude toward evolution.

Author:  Roland Trimen
Addressee:  Charles Robert Darwin
Date:  13 Apr 1872
Classmark:  DAR 178: 191
Letter no:  DCP-LETT-8285
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