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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   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 (3)
Correspondent
Darwin, C. R.disabled_by_default
Doubleday, Henrydisabled_by_default