Mecyna asinalis, sometimes known as the madder pearl, is a species of moth of the Crambidae family. It is found in west and southern Europe, including Ireland, Britain, the Iberian Peninsula, France, Germany, Switzerland, Italy, Albania, Croatia, Greece and Sicily, Sardinia, Malta, Madeira, Corsica, the Azores and the Canary Islands. The wingspan is 25–29 millimetres (0.98–1.14 in). The moth flies from May to October depending on the location. There are probably two generations per year. The larvae feed on the leaves of Rubia peregrina.