Udea montanalis is a moth in the family Crambidae. It was described by Schaus in 1912. It is found in Costa Rica.[1]
The wingspan is about 21 mm. The forewings are brown, with darker irrorations and a round whitish dark-edged spot in the middle of the cell and a curved whitish line on the discocellular, more broadly edged with dark brown. There is a small black postmedial spot on the costa. The hindwings are white with a brownish line terminal, somewhat interrupted by the veins.[2]