The caterpillar has beautiful colors, and the adult body limbs and wings are covered with scales and hairs, so the two pairs of wings are scale wings, and the forewings are larger than the hind wings; siphon-type mouthparts (the primitive small-winged moths have a well-developed upper jaw, chewing type ); antennae are filamentous, bi-cten-shaped, cten-shaped, club-shaped, etc.; compound eyes are well developed, with 2 or no ocelli. The larvae are worm-like, with 3 pairs of thoracic legs, and mostly 5 pairs of abdominal and caudal legs.
