---

Male Pollenia are the most frustrating creatures. You can have whizzed half a dozen neatly through the key and be starting to get smug, thinking 'aha, I am getting the hang of these' then you will get two in a row that just will not come out the other end of the key with a name :@

I currently hate Pollenia, but just for you, Juergen, I will say this:

Not amentaria – dusting on abdomen clearly tessellated and shifting, not weak with lots of shining black.

Not vagabunda – no dark median vitta between pre acr.

Pediculata? hmm...basicosta appears black, which would eliminate. Can't see key character which is bunch of pale curly hairs on node of humeral x-vein and Sc. This feature is on the underside, so never going to be visible in photos.

Not griseotomentosa - large size of the above specimens eliminates this rather small species, as well as lack of dark median line and posterior margins of tergites.

Dark basicosta probably eliminates rudis, angustigena and pallida.

Could be labialis.

But it's a bit 'could' and I wouldn't like to swear to it.