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 .
The moth flies from May to August depending on the location. The larvae feed on various mosses.