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Came to my hand (Spain: Huesca: Torla-Ordesa: Ordesa Circus; about 1700 masl, 21/08/2020)

With the online interactive keys (CERRETTI, TSCHORSNIG, LOPRESTI, DI GIOVANNI. (2012) keyed out Tachina and then followed this steps to species with TSCHORSNIG, H. -P. , HERTING, B., RAPER, C. M., RAYNER, R. 2002.

Calyptrae white
Thorax with only the normal short black hairs
There are 3 intra alar setae (3 ia) behind the suture (so it's not praeceps)
Frons in males about 1.1x (1.05-1.15) as wide as one eye (seen dorsally, measuring with Photoshop).
Fore tarsus black.
Males: anterior claws clearly shorter than the last 2 tarsal segments combined (Ts5+Ts4)/Claw=1.5)
Frons with at least 1 outer orbital bristle.