Eudonia lacustrata is a species of moth of the family Crambidae described by Georg Wolfgang Franz Panzer in 1804. It is found in Europe, north-west Africa, Asia from Turkey, Iran and Syria[1] to Siberia and the western part of China (Hunan). The subspecies E. lacustrata persica is found in Iran and Armenia.
The wingspan is . Forewings whitish, sometimes mixed with light ochreous-yellowish, sprinkled with black ; base black-marked ; lines whitish, blackish-edged, first irregular, second rather sinuate ; orbicular and claviform dot-like, black ; a black X-shaped discal mark ; terminal area grey mixed with black, subterminal line white, interrupted in middle. Hindwings whitish-grey, darker terminally. Larva yellowish-green ; spots brownish-green ; head and plate of 2 black-brown: on mosses; 3, 4. [2]
The moth flies from May to August depending on the location. The larvae feed on various mosses.