oops! I found my picture and it was an emperor moth with a 5-inch wingspan. I saw it in San Marcos, TX in 2002. Until then I had no idea moths could be interesting. Your site is even more of an eye opener.
Oh wow I finally see the species that I think I saw and photographed in Texas: the white witch. I hope I still have the picture. It was so still I was able to run back into the house and get a ruler to put next to it. It was so amazing I thought nobody would believe me if I didn't take the picture. If I can find it I'll send it to you.
Thanks for this page. It's amazing.