Good article by Fritz Müller in Kosmos supporting August Weismann’s views on caterpillars.

Is dispatching December number of Kosmos.

Will read the discussion on stridulation that RM mentioned.

Thinks there can be no objection to RM’s using a Fritz Müller letter [see 11319].

Thanks RM for his interesting paper ["Entomological notes bearing on evolution", Ann. & Mag. Nat. Hist. 5th ser. 1 (1878): 155].

Reports butterfly species that apparently mimic each other and gives details of some odoriferous species.

[Letter copied in Raphael Meldola’s hand from original sent to Meldola with 11449.]

Asks RM to send a copy of the Entomological Society’s Proceedings to Fritz Müller.

Thinks RM may like to see the enclosed [Fritz Müller letter].

Observations on a sensitive Mimosa.

Comments on structure and positioning of "odoriferous organs" of moths and butterflies,

and feeding habits of butterfly larvae.

Would like to have some insect photographs identified; they seem to show pretty and new case of protective resemblance.

Encloses Fritz Müller letter, which may be of interest [see 11463].

RM should take no more trouble over the subject [Otto Zacharias’ photos; see 11510].

Is glad RM will draw up a paper from Fritz Müller’s letter.

Has received interesting essay from August Weismann on sexual selection in daphnoids [“Schmuckfarben der Daphnoiden”, Z. Wiss. Zool. (1878)].

Does not think the Petunia is anything remarkable.

Will do his best to provide preface for Weismann’s Studien [see Collected papers 2: 280–1].

Invites RM to luncheon.

Regrets he cannot compare his work with Weismann’s in his preface as he feels “an author is never a fit judge of his own work”. [Appended note explains that RM wished CD’s work to be fully acknowledged, which was frequently not the case in continental writings.]

Is glad book progresses; answers translation query.

Francis Darwin does not have time to lecture.