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To Roland Trimen   2 January [1868]

Summary

CD seeks information on the variation of ocelli within species of butterflies.

Author:  Charles Robert Darwin
Addressee:  Roland Trimen
Date:  2 Jan [1868]
Classmark:  Royal Entomological Society (Trimen papers, box 21: 62)
Letter no:  DCP-LETT-5772

To Roland Trimen   16 January [1868]

Summary

Thanks RT for drawings of ocelli, especially for the description of ocelli of S. African Saturniidae. Would like to know of any cases in which the ocelli are confined to the male, to illustrate better the case of the peacock.

Author:  Charles Robert Darwin
Addressee:  Roland Trimen
Date:  16 Jan [1868]
Classmark:  Royal Entomological Society (Trimen papers, box 21: 63)
Letter no:  DCP-LETT-5790

To Roland Trimen   12 February [1868]

Summary

Is interested in the relative numbers of males and females of all animals; wants any instances of males, or females, being in excess.

Author:  Charles Robert Darwin
Addressee:  Roland Trimen
Date:  12 Feb [1868]
Classmark:  Royal Entomological Society (Trimen papers, box 21: 64)
Letter no:  DCP-LETT-5867

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

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

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

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   13 January 1868

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Summary

Variations in the ocelli of Lepidoptera.

Encloses six pages from his catalogue of S. African butterflies [Rhopalocera Africae australis, 2 pts (1862, 1866)].

Author:  Roland Trimen
Addressee:  Charles Robert Darwin
Date:  13 Jan 1868
Classmark:  DAR 84.1: 40–2, 168
Letter no:  DCP-LETT-5785

From Roland Trimen   10 February 1868

Summary

Sends prospectus of forthcoming work by his brother [Henry Trimen] and W. T. Thiselton-Dyer [Flora of Middlesex (1869)]. Hopes CD will subscribe.

Author:  Roland Trimen
Addressee:  Charles Robert Darwin
Date:  10 Feb 1868
Classmark:  DAR 178: 186, DAR 84.1: 135b
Letter no:  DCP-LETT-5857

From Roland Trimen   20 February 1868

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Summary

Proportion of sexes in butterflies; discussion of subject at meeting of Entomological Society, London.

Attraction of males by female Lasiocampa quercus. [see Descent 1: 311–12.]

Author:  Roland Trimen
Addressee:  Charles Robert Darwin
Date:  20 Feb 1868
Classmark:  DAR 85: B59–60a
Letter no:  DCP-LETT-5902

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

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

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
Document type
letter (15)
Addressee
Correspondent
Darwin, C. R.[X]
Trimen, Roland[X]
Date
1868
01 (3)
02 (4)
03 (6)
04 (2)
letter