Scourging........whip

[Epictetus]

The only visual evidence I know about is from the frescoes in the Villa of the Mysteries. If you go forward a couple of pages in the link you can see the winged divinity about to scourge the bare back of a lady who has her face buried in another's lap.

Here is an image of the winged character. It looks like she is using a simple whip, or perhaps even a thin, supple branch.


Edit: And I just found another, earlier image. This is supposedly from an Etruscan tomb. It looks like they are using a short, thin branch or stick.