Ambia mesoscotalis is a moth in the family Crambidae. It is found in Indonesia, where it has been recorded from the Maluku Islands (Banda).[1]
The wingspan is about 12 mm. The base of the forewings is fuscous, with an obscure white subbasal line and an orange-yellow band on its outer edge. There is a medial orange-yellow line expanding outwards on the costal area, with a white discoidal lunule on it and some fuscous on its lower edge. There is also an orange-yellow band edged by a fuscous line curved round from the costa before the apex to the lower angle of the cell and emitting a streak on the costa. There is also a terminal orange band with a fine fuscous line on its inner side, and suddenly bent outwards to the cilia just before the apex, where there is a black point. The hindwings are white with a fuscous medial band with some orange on its inner edge. There is a postmedial orange band not extending below vein 2 and emitting streaks to the apex and termen at veins 5, 3 and 2.[2]