Blepharomastix strigivenalis is a species of moth in the family Crambidae.

The forewings are whitish suffused with ochreous.

The costal edge is black towards the base and there is a black spot at the base of the cell, as well as a subbasal black spot on the inner margin.

The antemedial line is blackish with a black spot at the costa.

The hindwings are whitish, suffused with fuscous brown and with a blackish terminal line.