Seirarctia is a genus of moths in the family Arctiidae. It contains the single species Seirarctia echo, the Echo Moth, which is found in North America, where it has been recorded from Georgia, Florida, Alabama and Mississippi. The habitat consists of thickets, scrubwoods and open areas.
The wingspan is about 45 mm.
The larvae feed on various woody plants, including coontie, cabbage palmetto, crotons, lupie, oak and persimmon. They are bright orange with black and yellow bands and bright white spiracles.