Some Kind of Tiger Moth

I found this snow-white moth in my back yard and photographed it, hoping to identify it later. I didn't know enough to make it turn over so I could see its abdomen, which might have helped.


(Click on images to enlarge)



The orange-yellow forelegs make me think it might be an Agreeable Tiger moth. I have no idea how that species got its name, but this guy was quite pleasant about letting me take his picture. Larval hosts include dandelions and plantain, both of which are plentiful around here.

Or maybe it's a Virginian Tiger moth. If I could see whether its abdomen had a yellow patch, I would know.