i·o moth 
(īō, ēō)
(īō, ēō)n.
A large yellowish or reddish-brown North American moth (Automeris io) having a prominent eyelike spot on each hind wing.
[After IO, who was tormented by gadflies sent by Hera as a punishment (from the stinging spines of its larvae).]
io mothfemale (top) and male (bottom) io moths
Automeris io