Ctenucha brunnea

Description

Ctenucha brunnea (brown ctenucha or brown-winged ctenucha) is a moth of the family Erebidae. It is found from central to southern coastal California. The length of the forewings is 18–20 mm. The forewings are pale brown with black veins and a blue spot at the wing base. The costa and fringe of the outer margin is white. Adults are on wing from mid May to mid July. They feed on the nectar of Heteromeles arbutifolia. The larvae feed on Leymus condensatus.