Promenesta leucomias is a moth in the family Depressariidae. It was described by Edward Meyrick in 1925. It is found in Pará, Brazil.[1]
The wingspan is 13–14 mm. The forewings are rather light fuscous with the costal edge yellow ochreous and with a round apex and termen, as well as a series of short dark fuscous marks separated by pale ochreous. The hindwings are dark grey.[2]