I hope someone will give me a second opinion. I believe may be Adoneta bicaudata, which Wagner says "occurs locally in the East." His inset photo shows two simple reddish spots where mine has more like two double pairs, but he also says a key character is that the posterior pair of horns is "narrower, curved inwardly, and 2-3 times longer than those of A. spinuloides.

The posterior pair of horns in my photo are certainly more narrow than spinuloides' "gumdrop-shaped pair" and is indeed much longer than the horns of spinuloides. I can't see that the horns in my photo curve inwardly, but that character is barely visible in Wagner's photo, either.

Of course it is possible there is an instar difference, or just individual variation, at work here. I see Neartica.com lists four Adoneta species, while Wagner's eastern guide gives only two.

Any thoughts?