Black-horned Gem Microchrysa polita
This attractive little fly is told from others in its genus by the black (not orange) antennae and mostly black front femora (yellow at the tip, not mostly yellow).
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Black-horned Gem Microchrysa polita, North Elmham (Norfolk, UK), 26th October 2021
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Black-horned Gem Microchrysa polita showing antennae, Cooper Street Drove near Ash (Kent, UK), 3rd May 2026