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Hi Al, I think Machimus (Tolmerus) cingulatus is correct. Resembling is M. cowini and difficult to distinguish but as we can see the posterior yellow stripe on forefemur it is most probably cingulatus.

Roofvliegen van Nederland en België inclusief Denemarken en de Britse Eilanden, Reinoud van den Broek, André Schulten

Wolff, Gebel, Geller-Grimm: Die Raubfliegen Deutschlands



NB: it's better to place your queries for robberflies in the Asilidae forum to attract the experts.