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Thanks, but unfortunately the resolution is not good enough to see the hairs on t3 or if there ae 1 or 2 pv bristles on t1.
I've recognised another character in the Rognes key to point to P. peusi (plus others that don't appear in Austria): "Calypters, including morgins, rather pure white.
But after all, it's not enough to name the species with confidence, I think. Especially because no acrs can be seen...