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From Roland Trimen   31 December 1867

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Summary

On ocelli.

Sexual differences and proportion of sexes in butterflies.

Coleoptera.

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

Author:  Roland Trimen
Addressee:  Charles Robert Darwin
Date:  31 Dec 1867
Classmark:  DAR 82: A30–1
Letter no:  DCP-LETT-5744
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