Scoparia ambigualis is a species of moth of the family Crambidae described by Friedrich Treitschke in 1829. It is found in Europe and Asia Minor and possibly in Guangdong and Shanxi in China.[1]
The wingspan is 15–22 mm. The forewings are whitish, more or less sprinkled with grey and black; a black ochreous-mixed mark from base of costa; lines whitish, dark -edged, first irregular, second angulated above middle; orbicular elongate, brownish, more or less black-edged, resting on first line; claviform dot- like, black, seldom elongated to touch first line; discal spot 8-shaped, incompletely black edged, upper and sometimes lower half pale greyish-ochreous or brownish; terminal area dark, subterminal line cloudy, whitish; a terminal series of blackish marks. Hindwings are prismatic grey-whitish, terminally suffused with grey.[2]
The moth flies from May to September depending on the location.
The larvae feed on valerian and probably also on various mosses.