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To Professor W.H. Hunter, Lincoln, Nebraska. “…Jacks did not find a specimen in his private collection, so we decided to lend you our specimen of the questionable Chilosia for an investigation….” Hans Herman Behr was a German-American Doctor who settled in San Francisco and became the city’s leading biologist and entomologist, writing extensively on California natural history, including the 1888 classic, “Flora of the Vicinity of San Francisco”. He writes here as an official of the Academy of Sciences, sending a type of hoverfly to a fellow scientist.