Species of fly
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Platycheirus nielseni is a Holarctic species of hoverfly.
Description.
External images
For terms see Morphology of Diptera ;br ; Tibiae 2 uniformly broadened from base towards apex then becoming smaller and then swelling strongly on apical 1/5.
Distribution.
Palearctic Fennoscandia South to northern France (Vosges).Ireland Eastwards through Northern Europe and Central Europe, northern Italy to EuropeanRussia; Siberia Nearctic Alaska through Canada and South through the Rocky mountains to Colorado.
References.
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