Cosmopterosis thetysalis

Cosmopterosis thetysalis is a moth in the Crambidae family. It was described by Walker in 1859. It is found from southern Venezuela and north-western Brazil north to the coast of Surinam and French Guiana.

The apical and tornal areas of the forewings are brown with a yellow spot from the costa to the middle of the wing. The subterminal line is silver. The hindwings have a linear patch consisting of white scales, intermixed with brown scales. There are five large marginal spots.