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I think it's a female Chorisops nagatomii.
Frons glossy green
Humerus and postalar knob yellow
Female's abdomen mostly yellow, narrow black hind margins of tergites...
Families of Flies with Three Pulvilli (Zeegers, Schulten)

Mason F (2013) Updated Italian checklist of Soldier Flies
ZooKeys 336: 61–78