Monoctenia smerintharia, more commonly known as the dark leaf moth, is a moth of the family Geometridae first described by Rudolf Felder and Alois Friedrich Rogenhofer in 1875. It is found in Australia.[1] The larvae feed on the leaves of gum trees.
The adult moths are brown, sometimes with black smudges and scalloped submarginal lines on the forewings and a reddish shading on the hindwings. The wings have scalloped edges, and the forewing tips are recurved. The wingspan is about 6 centimeters. Its natural posture has the wings closed like a tent over the body, with the tip of the abdomen curved upward.[2]