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Being a bit opinionated....In Engel it keys out to Machimus fimbriatus. Description fits pretty good. Personally i think the epandrium is too pointy and curved. Whatever your conclusion keep a cf.

Hypopygium M. gonatistes: http://www.robberflies.info/keyger/images/800/Asilinae/Machimus/gonatistes_m1_11_COGG.jpg