Note longer white hairs protruding below the abdomen in this individual.
I saw what looked like courting behavior in some of these, but was unable to photograph it .
IDed by cdozo as Common Mestra (Mestra amymone)
On the ventral side, both wings were largely orange (a sort of caramel color) with a band of white and some smaller white spots on the forewing and a band of gray border thinly with black, and a row of uneven white spots and smaller white spots on the hind wing:
We did have it on the species list, but hadn't seen it for years. Now it's abundant.