Metasia strangalota is a moth in the family Crambidae.

It is found in Australia, where it has been recorded from New South Wales.

The first and second lines are strongly marked, irregular and blackish, the first running from one-fourth of the costa to one-third of the inner margin.

There is a small round pale spot strongly outlined with blackish beneath the costa beyond the first line, and a transverse-oblong pale discal spot strongly outlined with blackish beyond the middle.

The hindwings have a similar colour and markings as the forewings.