Similar species:
Tarsolepis sommeri (Hübner, [1821])
Separating sommeri and rufobrunnea vide Moths of Borneo.
http://www.mothsofborneo.com/part-4/tarsolepis/notodontidae_1_1.php
 

Diagnosis. The only possible species with which this could be confused is its congener rufobrunnea (see below). In sommeri the external silver triangle of the forewing is separated from the grey marginal zone by a dark brown crescent within its width rather than by a long, lenticular, ochreous yellow band. The hindwings above are paler brown basally, the veins picked out darker, the margin slightly rounded, crenulate, whereas in rufobrunnea the wing is uniform dark brown, the margin more or less straight. The ground colour below is fawn rather than pinkish. The female antennae are filiform rather than weakly pectinate. The third joint of the palp is long rather than short. The uncus of the male genitalia is bifurcate rather than entire. A tuft of red hair scales occurs ventrally at the base of the abdomen.