Desmia odontoplaga is a moth in the Crambidae family. It is found in Panama and Brazil (Paraña, Lower Amazons). The wingspan is about 20 mm. The forewings are fuscous brown with a cupreous tinge. There is an elliptic white spot in and below the middle of the cell with a speck beyond its lower point and an obscure line from it to the inner margin, as well as a white postmedial patch. There is a large medial white patch on the hindwings.