Metasia polytima is a moth in the family Crambidae. It was described by Turner in 1908. It is found in Australia, where it has been recorded from Queensland.[1]
The wingspan 14–15 mm. The forewings are pale-reddish with a broad dark-fuscous costal streak, a fine fuscous transverse line and a pale discal spot outlined with fuscous and connected by a fine fuscous line with the dorsum beyond the middle. There is also a wavy dark-fuscous line from the costa to before the tornus and the disc is suffused with fuscous beyond this. The terminal line is dark-fuscous. The hindwings have the same colour, antemedian, postmedian and terminal lines as the forewings.[2]