1816—Hübner, Verzeichniss, 192.

1864—Pack., Proc. Ent. Soc., Phil., III., 122.

1874—Strech, Zyg. & Bomb., 191.

The head is small and retracted; tongue obsolete, palpi very small and weak; antennæ moderately long, bipectinated in the male, simple in the female; the pectinations are long and extend to the tip; legs short and weak, all the spurs present, but very short: the two paris of the posterior tibiæ close together. The tarsal claws are as in Spilosoma, and, indeed, there is no structural difference between these two genera. Antarctia has shorter, broader wings, somewhat longer vestiture, and is not white!