---

Good question Stephane, there is also an apparently missing halter on the fly in question unless it's the dark blob I can see on the anterior edge of the calypters.

I checked the keys for female P. erronea, t1 doesn't have a posterior bristle. The hind femora have a complete row of strong anteroventrals too. I guess the keys are correct and not referring to a previous incorrectly named fly?

From reading older threads I have realised there is a difference in the frons at the vertex, the keys for P. scutellata states it is 1/3 of the total width of the head. What is the reason for it not being scutellata?