“That such a moth exists in Madagascar may be safely predicted”

—  Alfred Russel Wallace

"Creation by law". Quarterly Journal of Science 4: 470–488 (1867); The hawkmoth of Madagascar was later found and described in 1903, under the taxon name praedicta in reference to Wallace's quote.
Context: I have carefully measured the proboscis of a specimen of [Neococytius] cluentius from South America in the collection of the British Museum, and find it to be nine inches and a quarter long! One from tropical Africa ([Xanthopan] morganii) is seven inches and a half. A species having a proboscis two or three inches longer could reach the nectar in the largest flowers of Angræcum sesquipedale, whose nectaries vary in length from ten to fourteen inches. That such a moth exists in Madagascar may be safely predicted; and naturalists who visit that island should search for it with as much confidence as astronomers searched for the planet Neptune - and they will be equally successful!

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Alfred Russel Wallace 12
British naturalist, explorer, geographer, anthropologist an… 1823–1913

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