Comments on AW’s work [Studien zur Descendenz-Theorie, vol. 1 (1875)].
On seasonal dimorphism in Lepidoptera in relation to sexual selection.
Discusses evolutionary reversion.
Comments on birds’ avoiding brightly coloured caterpillars. Offers references on subject.
Alpheus Hyatt says Franz Hilgendorf mistaken [about Planorbis multiformis].
Quotes from letter from J. J. Weir on birds’ rejection of brightly-coloured caterpillars.