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Darwin, C. R. in correspondent 
Müller, Fritz in correspondent 
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From:
Johann Friedrich Theodor (Fritz) Müller
To:
Charles Robert Darwin
Date:
12 Sept 1875
Source of text:
Möller ed. 1915–21, 2: 318; Royal Botanic Gardens, Kew (PrP 08-0011)
Summary:

Has read CD’s book on Drosera [Insectivorous plants] and found that it presents new material and is very interesting.

Has discovered that the parasites he thought he had found in Melipona nests are in fact true females. It is remarkable that they differ so greatly from the sterile females and males of their species.

Contributor:
Darwin Correspondence Project
From:
Johann Friedrich Theodor (Fritz) Müller
To:
Charles Robert Darwin
Date:
25 Dec 1875
Source of text:
Nature , 17 February 1876, pp. 304–5
Summary:

"Sambaquis", or shell mounds accumulated by former inhabitants of the coast, contain shells of some animals that FM has never seen living.

Ants that live on imbauba trees (Cecropia) are attracted by small bodies at base of each petiole.

Contributor:
Darwin Correspondence Project