Palps: One pair (labial), maxillary being minute and hidden under scale cover

Proboscis: Naked

Chaetosema: Absent

Tympanal organ:Absent in abdomen

Hind wing: 2 anal veins; with Sc + R1 & Rs usually arising from the wing base (free) (except the genus Addaea Walker, [1866] 1865[1866] 1865) but close together, sometimes fused in midwing.