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From Thomas Vernon Wollaston   2 March [1855]

Summary

Hybrid insects.

Description of the Salvages.

Variability of "transition groups" of insects; relation of variability to ranges of insects. The variability of wings, even within species. Reduction of flying ability on isolated islands.

Forbes’s "Atlantis" theory and insect fauna of the Atlantic islands, considered with regard to insect migrations.

Author:  Thomas Vernon Wollaston
Addressee:  Charles Robert Darwin
Date:  2 Mar [1855]
Classmark:  DAR 181: 136
Letter no:  DCP-LETT-1640

From G. R. Waterhouse   [after 2 March 1855]

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Summary

Gives instances of sexual differences in the number of tarsi within species of Coleoptera and also variation in the number of tarsi between related species.

Author:  George Robert Waterhouse
Addressee:  Charles Robert Darwin
Date:  [after 2 Mar 1855]
Classmark:  DAR 47: 133–4
Letter no:  DCP-LETT-1625
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