Stenoma halmas is a moth of the Depressariidae family. It is found in Peru. The wingspan is about 25 mm. The forewings are light fuscous irrorated grey-whitish and with the extreme costal edge yellowish except towards the base. There is some undefined fuscous suffusion on the costa at one-third, and semi-oval dark fuscous spots beyond the middle and at four-fifths. There is a blotch of brownish suffusion on the middle of the dorsum. The second discal stigma is dark fuscous and there are several indistinct darker dots in a subterminal series on the lower part of the wing. There is a marginal series of black dots around the apex and termen. The hindwings are pale ochreous-yellowish, the posterior half suffused grey, the terminal edge yellowish.