Platycheirus nielseni is a Holarctic species of hoverfly.
Description External images For terms see Morphology of Diptera Tibiae 2 uniformly broadened from base towards apex then becoming smaller and then swelling strongly on apical 1/5.
Distribution It is found from the Palearctic in Fennoscandia, then south to northern France (Vosges) and Ireland, then eastwards through Northern Europe and Central Europe, northern Italy to European Russia; then by Siberia Nearctic Alaska it is found through Canada and goes south through the Rocky mountains to Colorado.
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