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To Henry Doubleday   1 March [1868]

Summary

Has been interested in copy of HD’s letter to H. T. Stainton on numerical proportions of the sexes of insects. Do they vary during different years?

Does he have opinions about the courtships of butterflies?

Will send a copy of his paper on Primula when it is published. [See 5997.]

Author:  Charles Robert Darwin
Addressee:  Henry Doubleday
Date:  1 Mar [1868]
Classmark:  George W. Platzman (private collection)
Letter no:  DCP-LETT-5966A

To Henry Doubleday   20 March [1868]

Summary

CD asks about HD’s observation of sexual call of Coleoptera.

Also comments on statements by collectors that they breed more females than males from caterpillars. CD had thought this might be accounted for by the collection of largest and finest caterpillars, but Alexander Wallace says the collectors take large and small equally. Does HD agree with Wallace?

Author:  Charles Robert Darwin
Addressee:  Henry Doubleday
Date:  20 Mar [1868]
Classmark:  American Philosophical Society (Mss.B.D25.)
Letter no:  DCP-LETT-6027

To Henry Doubleday   15 April [1868]

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Summary

Submits lists of insects [missing] for correspondent to check whether brightly coloured. Wants to determine whether there is any relation between bright colouring, whether in both sexes or one alone, and an unequal number of males and females.

Author:  Charles Robert Darwin
Addressee:  Henry Doubleday
Date:  15 Apr [1868]
Classmark:  DAR 82: 121-2
Letter no:  DCP-LETT-6123

From Henry Doubleday   8 March 1868

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Summary

Proportion of sexes in Lepidoptera.

Sexual preference.

Role of coloration [see Descent 1: 311–12].

Author:  Henry Doubleday
Addressee:  Charles Robert Darwin
Date:  8 Mar 1868
Classmark:  DAR 85: B47–8
Letter no:  DCP-LETT-5997

From Henry Doubleday   28 March 1868

Summary

On the proportion of sexes in moths; Lepidoptera females command higher prices; quotes Staudinger’s catalogue [see Descent 1: 311–12].

Ticking of Anobium tessellatum [see Descent 1: 385].

Author:  Henry Doubleday
Addressee:  Charles Robert Darwin
Date:  28 Mar 1868
Classmark:  DAR 82: A11–12, DAR 86: A94
Letter no:  DCP-LETT-6064

From Henry Doubleday   3 April 1868

Summary

Otto Staudinger’s catalogue shows prices of female Lepidoptera to be higher than those of males.

Author:  Henry Doubleday
Addressee:  Charles Robert Darwin
Date:  3 Apr 1868
Classmark:  DAR 81: 78, DAR 82: A8
Letter no:  DCP-LETT-6087

From Henry Doubleday   22 April 1868

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Summary

On proportion of sexes;

coloration of sexes in Lepidoptera.

Sexual attraction of female Saturnia carpini.

Author:  Henry Doubleday
Addressee:  Charles Robert Darwin
Date:  22 Apr 1868
Classmark:  DAR 82: A9–10
Letter no:  DCP-LETT-6139
Document type
letter (7)
Correspondent
Darwin, C. R.[X]
Doubleday, Henry[X]
Date
1868
03 (4)
04 (3)
letter