Steniodes nennuisalis is a moth in the family Crambidae.

The forewings have a light buff antemedial line, outangled in the cell, outwardly shaded with fuscous from the subcostal to the inner margin.

The postmedial line is light buff, broadly shaded on both sides with fuscous.

There are terminal triangular fuscous spots connected by a fine line.

The termen is more thickly irrorated with buffy brown and there is a diffuse terminal fuscous line.