Image from: Godman, Frederick DuCane, and Osbert Salvin 1893. Biologia Centrali-Americana. Insecta. Lepidoptera-Rhopalocera. London, Dulau & Co., Bernard Quaritch. 2: 241-256 (March), 257-264,
pl. 73 (April), f. 18
Image courtesy Missouri Botanical Garden. http://www.botanicus.org/