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This is T. ruralis Loew, 1844, and certainly NOT T. tanaceti.
You can see at higher magnification that its abdomen has black setulae at bases of tergites and long white setae at margins, wing with dark pattrn entering the anal lobe, posterior notopleural seta white, and oviscape relatively short and red rather than long or black.
Larvae in Hieracium spp.
May I please ask you for coordinates in turn?