Male. Head, thorax and abdomen black, covered with long silvery-grey, hair-like vestiture; antennae greyish-brown, strongly bipectinate and composed of eighteen joints; fore tibia without epiphysis; wings uniformly smoky, without markings and sparsely covered with short pile; fore wing with area adjacent to outer side of the upper part of the discal cell sunken, causing this to appear as an elongate, obscure discal spot; costal and outer margins of all wings darker; fringes light grey. Expanse: 19 mm.