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Following Ozerov, A. L., Krivosheina, M. G. (2015): A review of the genera Cleigastra Macquart, Gonarcticus Becker, Gonatherus Rondani, Hexamitocera Becker, Nanna Strobl, Orthacheta Becker and Spathephilus Becker (Diptera, Scathophagidae) of Russia. Zootaxa 4012 (2): 201-258, DOI: http://dx.doi.org/10.11646/zootaxa.4012.2.1 it is N. falvipes. I whould call it N. multisetosa, a valid species and not a synonym of. N. flavipes as given by Ozerov & Krivosheina, using another, specific hostplant, and inhabiting another biotop.
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