Cyclophora linearia, the clay triple-lines, is a moth of the Geometridae family. The species can be found in Europe, primarily in the southern half of Britain. The wingspan is 26–33 mm. The basic colour of the wings is pale brown to orange in the first generation and rose-red in the second generation. On the front wing are three cross lines, black to reddish in color, the middle is wider. The cross lines are often vague in the second generation. The moths fly from May to July depending on the location. The larvae feed on beech.