From:
Henry Doubleday
To:
Charles Robert Darwin
Date:
26 Jan 1857
Source of text:
DAR 162: 235
Summary:
Sends specimens of Tortrix, which illustrate the extraordinary variation of markings in two or three species. In every family of Lepidoptera there seem to be species extremely prone to vary and in some localities they vary more than in others.
Contributor:
Darwin Correspondence Project