Sexual ornamentation of insects: coloration of Epicalia genus [of tropical S. American butterflies];

horned genera of lamellicorn beetles [see Descent 1: 370, 388].

Wallace brought CD’s question about gay-coloured caterpillars before the Entomological Society. Members now seeking explanations.

Working on sexual differences in collection of horned beetles and will send CD results.

Answers CD’s questions [sent on behalf of Miss Tollet of Betley Hall, Staffs.] on mimicry – how it helps prevent extinction, the modifications occurring with a change of habitat until mimicry occurred.

Also gives some cases of sexual differences.

Would like tabulation of horned beetles if not too troublesome, but would easily settle for general remarks.

On the subject of other species mocking Heliconidae, asks whether full-coloured ones were mocked. Expresses full belief in HWB’s theory.

Encloses a copy of A. R. Wallace’s letter to the Field requesting observations on which caterpillars birds devour.