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I have seen the Petasophora fly into the centre of a dancing column of midges and rapidly darting first at one and then at another, secure half-a-dozen of the tiny flies before the column was broken up; then retire to a branch and wait until it was re-formed, when it made another sudden descent on them. Two of them that I examined had these spiders in their crops.
A third species, also seen at this brook, Petasophora delphinae, Less., is of a dull brown colour, with brilliant purple ear-feathers and metallic-green throat. Both it and Florisuga mellivora are short billed, generally catching flying insects, and do not frequent flowers so much as other humming-birds.
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