Introduction of humble-bees into Australia.
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The Charles Darwin Collection
The Darwin Correspondence Project is publishing letters written by and to the naturalist Charles Darwin (1809–1882). Complete transcripts of letters are being made available through the Project’s website (www.darwinproject.ac.uk) after publication in the ongoing print edition of The Correspondence of Charles Darwin (Cambridge University Press 1985–). Metadata and summaries of all known letters (c. 15,000) appear in Ɛpsilon, and the full texts of available letters can also be searched, with links to the full texts.
Introduction of humble-bees into Australia.
Thanks for copy of HS’s First principles [? 2d ed. (1867)].
Comments on HS’s Principles of biology [1864, 1867].
The horns and spines of homopterous insects do not vary between sexes. Sexual differences in Blattidae.
On the summer, or breeding, plumage of birds.