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Hi Tor, thanks again for the extra photos, I see now that the earlier photo which looks like a bifid antenna is due to the coincidental position and shadow of the arista! Photographs are a lot trickier to decipher than holding a specimen under a stereo microscope which is why we were asking for different angles. It was certainly our honest opinion that there were out of focus hairs on the apical r1 in the photos you posted, though the close-up of the arista in your most recent photo is certainly consistent with hertingi or setinervis.
I'm not sure I understand your comment regarding the possibility of "amateurs" finding species additional to a published country list - it happens all the time, a local friend here in the UK has added several tachinids to the UK list, I have added to the Italian fauna and many others who post on Diptera.info have extended the known ranges of European species...
regards,
Steve