Description from Academy of Natural Sciences website: The Titian Peale Butterfly and Moth Collection Automeris io (the "Io Moth") is a widespread North American member of the wild silk moth family, Saturniidae. Peale collected and reared larvae of this common moth and apparently he mistakenly believed it to be a member of the "tent caterpillar" family Lasiocampidae. The incorrect generic name Lasiocampa appears on the plate depicting Automeris io that was published as part of Peale's prospectus for Lepidoptera Americana (1833).