Moved from ID Request.

Jim Edsall of BAMONA has since IDed this as a Rusty Holomelina (Virbia ferruginosa)

also can have the white spots in the same pattern on the front wing, and has orange hind wings, but the front wings are usually paler in color. The dark hind wing pattern is closer, but usually still more extensive. Just another name to throw in as a candidate - I don't know which one it is.

A couple of examples here and at the 'Moth Photographer's' web site.

Its definitely something in the genus Virbia. The species are all very variable, and several of them can show these white markings occasionally. The dark forewings, orange hindwings, location, and Light spots all seem to point to Virbia lamae, but that species apparently has a solid black border on the hindwings. (according to the Strickland Museum site; I've never seen lamae personally) Maybe someone with experience with the species could determine if the females can have spotted hindwings like this. This could be an aberrant of any number of other species of Virbia, but whatever it is, it's not the "typical" form of any of our common species...