No summary available.
Showing 41–60 of 245 items
No summary available.
Sexual differences in bird species and seasonal variation in plumage.
Sends a copy [missing] of a lecture by L. Agassiz on glaciers.
Claims worker wasps can generate additional workers in the absence of the fertile female.
Vladimir Kovalevsky wishes to translate Variation into Russian. He offers £1 per advance sheet.
Male dotterels take care of young and are less brilliantly coloured than females.
Discussion of origin of domestic sheep races. Some comments on the yak and the wild ancestors of the llama and alpaca.
Pleased that CD approves his idea about caterpillars.
Thinks CD is right about selection in butterflies, but still believes protective adaptation has kept down colours of females.
Cannot yet see action of natural selection in forming the races of man.
No summary available.
He has promised Mark [coachman to R. W. Darwin and Susan] that CD will continue the payment of £20 a year after EAD’s death; the house is rent free.
Reports observations on fertility of orchids he has self-pollinated and crossed with pollen of other species.
Observations on Ophrys plants and Thymus vulgaris. Encloses sketch of different forms of T. vulgaris [see Forms of flowers, p. 302].
On improving the educational system.
Has been hunting for an otter-hound for CD.
Hopes CD will visit his museum at the Horticultural [Society].
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.
ARW responds to CD’s list of queries about expression. Suggests acquiring informants through publishing the queries in newspapers. His doubts about their importance.
Has submitted caterpillar question to Entomological Society.
No summary available.
Requests CD’s subscription to his On systematic botany and zoology [1870]. "Progressive development" is a leading principle of his work.
Has been persuaded to accept BAAS Presidency.
On Charles Naudin’s discovery of seeds of Chamaerops fertilised by the date-palm.
Thanks CD for permission to translate Variation into Russian. The translation will be guided by his brother Alexander, a follower of Darwin,
whose articles on the affinity of ascidians and vertebrates he forwards.
Sends several plants with abortive anthers or bad pollen.