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Sorry, but I am not able to make a decision... I tried the key by van Veen (http://home.hccne...myopa.html) and Smit (https://www.repos...ent/507043) and checked the descriptions by Falk (https://www.flick...279506405/), but the pictures do not show enough details to be sure. E.g., M. testacea should have a completely black thoracic dorsum bordering the brown scutellum (well seen in Falk's photos), but here it seems to be reddish just before the scutellum. Let's see if we get still other responses of more experienced Conopidists!
Regards, Sundew