BATES, Henry Walter, English naturalist, born in Leicester, England, 8 February 1825. He was educated for a commercial career at private schools in Leicestershire, and in May 1848, undertook, in company with Alfred R. Wallace, a natural history exploration of the valley of the Amazons. Mr. "Wallace left in 1852, but Mr. Bates remained and explored the upper Amazons until June 1859. In a paper read to the Linnwan society on 21 November 1861, he described the phenomena of "mimetic resemblances" in animals, and suggested an explanation. This was printed in the transactions of the society (vol. xxiii., p. 495). He has been assistant secretary of the Royal Geographical Society, London, since April 1864, and has edited the journal and proceedings of the society during that period. lie was made a fellow of the Royal Society in 1881. Mr. Bates has published "The Naturalist on the River Amazons" (London, 1863); "Illustrated Travels" (6 vols., London, 1866-'72); "The German Arctic Expedition of 1869-'70" (English translation, London, 1874) ; " Central America, West Indies, and South America" (1878); and other works on natural history and geography.