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 |
From Roland Trimen 13 January 1868
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 |
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 |
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 |
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 |
From Roland Trimen 20 February 1868
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 |
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]
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]
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
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 |
letter | (15) |
Darwin, C. R. | (8) |
Trimen, Roland | (7) |
Trimen, Roland | (8) |
Darwin, C. R. | (7) |
Darwin, C. R. | (15) |
Trimen, Roland |