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From:
Charles Robert Darwin
To:
Heinrich Ludwig Hermann (Hermann) Müller
Date:
[9 Oct 1867]
Source of text:
Krause 1884 , p. 18
Summary:

Müller’s observations on orchids excellent.

Contributor:
Darwin Correspondence Project
From:
Heinrich Ludwig Hermann (Hermann) Müller
To:
Charles Robert Darwin
Date:
23 Oct 1867
Source of text:
DAR 171: 291
Summary:

Thanks for German version of Origin [1867].

Dipterous insects are adapted to eating pollen rather than only to sucking nectar. He describes such adaptations in two dipteran species.

Contributor:
Darwin Correspondence Project