From:
John Obadiah Westwood
To:
Charles Robert Darwin
Date:
26 Sept 1861
Source of text:
DAR 181: 89
Summary:
Has found the reference to Charles Morren’s paper, "On the agency of insects in causing sterility in flowers" [Proc. R. Entomol. Soc. Lond. 1 (1836): xliv–xlv].
Common white butterflies remove pollen-masses with their tarsi from plants of the Asclepiadaceae.
Contributor:
Darwin Correspondence Project