Tethea ampliata is a moth in the Drepanidae family. It is found in the Russian Far East, Korea, Japan, Taiwan and northern and north-eastern China. The wingspan is 41-48 mm. Adults are similar to Tethea or, but larger and the forewings are silvery grey. The inner band is darker and straighter with more dentate limiting lines. The outer band has an additional angle towards the costa and the outer line is more regularly undulated, blackish and parallel to the inner line.