Eudonia extincta is a moth in the family Crambidae. It was described by Harrison Gray Dyar Jr. in 1921. It is found in the Distrito Federal of Mexico.[1]
The wingspan is about 21 mm. The forewings are uniform shining brownish grey. There are two small black dots at the end of the cell and a third beyond these. The outer line is pale and diffuse. It is followed by a broad ill-defined darker shade. There are black terminal dots at the ends of the veins. The hindwings are sordid whitish. Adults have been recorded on wing in August.[2]