Axia, or the "Gold Moths", is a genus of moths whose precise relationships within the Macrolepidoptera are currently uncertain, but they currently represent a superfamily whose nearest relatives include the butterflies, Calliduloidea, Drepanoidea, Geometroidea, Bombycoidea, Mimallonoidea and Lasiocampoidea, and the Noctuoidea. Uniquely, they have a pair of pocket-like organs on the seventh abdominal spiracle of the adult moth which are possibly sound receptive organs . They are quite large and brightly coloured moths that occur only in Southern Europe and feed on species of Euphorbia. Sometimes they are attracted to light .