Pycnarmon sarumalis is a moth in the family Crambidae.

The wings are shining white, crossed by a subbasal transverse brown line.

There is a pale linear brown line at the end of the cell, with below it a similar brown line, and just beyond the latter, on the inner margin about its outer third, a well-defined black point.

A narrow brown line runs from the costa before the apex toward the inner angle.

The hindwings are traversed by an irregularly curved narrow pale brown median transverse line.