Blepharomastix strigivenalis is a species of moth in the family Crambidae. It was described by George Hampson in 1918. It is found in Ecuador.[1]
The wingspan is about 16 mm. 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.[2]