Tylostega valvata is a moth in the family Crambidae.

It is found in the Khasi Hills of India.

The forewings are yellow ochreous, almost wholly suffused with the base of the fringes alone remaining of the pale ground colour.

There is a patch of scales on the cell, which is edged with blackish, and the origin of the first line on the costa above the beginning of the patch is also blackish, but its lower course is lost in the dark suffusion.

There is a marginal dark space with a concise straight oblique edge internally, with a curved row of smoky and blackish fuscous.