Anadasmus vacans is a moth of the family Depressariidae. It is found in French Guiana.[1]
The wingspan is 38–40 mm. The forewings are light greyish-ochreous, usually with irregularly scattered black specks. The plical and second discal stigmata are minute and blackish, sometimes with a curved subterminal series of minute blackish dots. There is a terminal series of minute blackish dots. The hindwings are dark grey, with the apex more or less tinged with pale ochreous.[2]