Thoreau writes in his journal:
A large vellow butterfly (somewhat Harris Papilio Asterias like but not black-winged) three and a half to four inches in expanse. Pale-yellow, the front wings crossed by three or four black bars; rear, or outer edge, of all wings widely bordered with black, and some yellow behind it; a short black tail to each hind one, with two blue spots in front of two red-brown ones on the tail . . .