Voliba leptomorpha is a moth in the family Crambidae.

There is a basal fascia, expanded on the costa and there is also a transverse straight linear fascia, as well as a discal dot beneath the costa and a larger discal dot beneath the costa.

There is a postmedian line from the costa, bent inwards to touch the lower extremity of the posterior dot, and then to the dorsum.

From the upper bend it gives off a process to the tornus.

The hindwings are whitish, which a slight pale fuscous suffusion on mid-termen.