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If this was A. trifasciatus I would expect to see a transparent area on the basal side of the cross-vein R-M (i.e. part of the first basal cell would be transparent), which Ryan's fly doesn't have. Compare with Kahis' photo in the gallery:
https://diptera.i...to_id=2134

So I'm still of the opinion that this is likely to be A. anthrax. Would be good to hear from any of our continental colleagues who have more experience of these species!