Wishes to borrow third part of Fritz Müller’s article on sexual selection in butterflies [Kosmos 2 (1877–8): 218–24].

Is forwarding material on stridulation, including Prof. Wood-Mason’s paper ["Note on Mygale stridulans", Trans. R. Entomol. Soc. Lond. (1877): 281–2], which should interest CD.

Returns Kosmos.

Thanks CD for permission to use Fritz Müller’s last letter, which contains new observations.

Encloses proof of the Entomological Society’s Proceedings for February to show the use he has made of Fritz Müller’s letter [see 11319].

Will exhibit the photos at the Entomological Society and have them identified.

Fritz Müller’s observations on relative abundance of mimicking and mimicked species.

Prof. Wood-Mason has examined Otto Zacharias’ insect photographs and confirmed the genera.

RM is going to work up Fritz Müller’s observations into a paper.

Would like to read Weismann’s essay on Daphnidae.

Fritz Müller’s paper on odours emitted by butterflies was read at last Entomological Society meeting.

Plans to produce a translation of Weismann’s Studien zur Descendenz-Theorie [1875–6] and would welcome a preface from CD.

Thanks for agreeing to write the preface for RM’s translation of Weismann.

Will arrange to meet CD when he comes to London.

Thanks for preface. When RM’s translation is complete, would like CD to expand it slightly to refer to overlap between Weismann’s observations and CD’s theories.

Is making progress with the Weismann translation.

Wonders whether Francis Darwin would give a botanical lecture at a Bayswater school.