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Trimen, Roland in correspondent 
1860-1869 in date 
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From:
Roland Trimen
To:
Charles Robert Darwin
Date:
31 Dec 1867
Source of text:
DAR 82: A30–1
Summary:

On ocelli.

Sexual differences and proportion of sexes in butterflies.

Coleoptera.

[See Descent 1: 310; 2: 132.]

Contributor:
Darwin Correspondence Project
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From:
Roland Trimen
To:
Charles Robert Darwin
Date:
13 Jan 1868
Source of text:
DAR 84.1: 40–2, 168
Summary:

Variations in the ocelli of Lepidoptera.

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

Contributor:
Darwin Correspondence Project
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From:
Roland Trimen
To:
Charles Robert Darwin
Date:
10 Feb 1868
Source of text:
DAR 178: 186, DAR 84.1: 135b
Summary:

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

Contributor:
Darwin Correspondence Project
From:
Roland Trimen
To:
Charles Robert Darwin
Date:
20 Feb 1868
Source of text:
DAR 85: B59–60a
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.]

Contributor:
Darwin Correspondence Project
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From:
Roland Trimen
To:
Charles Robert Darwin
Date:
20 Mar [1868]
Source of text:
DAR 86: A92–3
Summary:

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

Contributor:
Darwin Correspondence Project
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From:
Roland Trimen
To:
Charles Robert Darwin
Date:
26 Mar 1868
Source of text:
DAR 81: 76, DAR 85: B61–2, DAR 84.1: 134–5
Summary:

Coloration in moths.

Quotes Achille Guénée on relative proportion of sexes in Phalaenites.

Contributor:
Darwin Correspondence Project
From:
Roland Trimen
To:
Charles Robert Darwin
Date:
27 Mar 1868
Source of text:
DAR 82: A120v
Summary:

Approves CD’s revision on coloration of moths.

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

Contributor:
Darwin Correspondence Project
From:
Roland Trimen
To:
Charles Robert Darwin
Date:
13 Apr 1868
Source of text:
DAR 85: B50–1
Summary:

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

Contributor:
Darwin Correspondence Project
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From:
Roland Trimen
To:
Charles Robert Darwin
Date:
18 Nov 1869
Source of text:
DAR 82: 27–9
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.

Contributor:
Darwin Correspondence Project
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