Alienia is a genus of moths of the Erebidae family. The genus contains only one species, Alienia flavofascia, which is found in Borneo and was described from the Crocker Range National Park in Sabah. The wingspan is about 12.5 mm. The forewings are dark brown at the basal part of the costa and yellow across the outer part of all of the basal area and on the postmedial, subterminal and terminal areas, including the fringes. The inner lower two thirds part of the basal area is pure yellow, and all of the medial area except the costa is yellow. The antemedial, postmedial, and subterminal lines are well marked (the last jagged) and the terminal line is indistinct. The hindwing are grey throughout without a discal spot. The underside of both wings is grey with a discal spot.