Can't easily place those insects, Franci. Possibly more southern species than we see in the UK.
The hoverfly seems similar to Dasysyrphus albostriatus but we don't see them here after September.
The butterfly is also confusing me. My first thought was one of the Grayling species but those black spots are more like a Ringlet variety. Not sure though, even after consulting the European species book.
If Greg's fly was in the UK, I would be considering Meliscaeva auricolis. There is a little more black on the head than with Franci's hoverfly.
Needs a skilled southern entomologist I suspect.