Eupanacra mydon is a moth of the family Sphingidae. It is known from Nepal, north-eastern India, Bangladesh, Myanmar, southern China, Thailand, Vietnam and Peninsular Malaysia. The wingspan is 53–62 mm. The sexes are dimorphic, the brown of the ground colour and darker markings of the female being somewhat more reddish. The wing margins are somewhat scalloped and the forewing is slightly excavate below the apex. There is a pale gold apical fringe consisting of a few large, metallic scales on the tegula. The middle of the thorax and anterior abdominal tergites are broadly greyish-clay. The abdomen upperside has a few racket-shaped white scales. The forewing upperside shaded with brown in both sexes, the male is not much paler than the female. The forewing underside has a submarginal line wh