Desmia parastigma is a moth of the family Crambidae described by Harrison Gray Dyar Jr. in 1914. It is found in Panama[1] and Costa Rica.[2]
The wingspan is about 29 mm. The forewings are black with two white hyaline (glass-like) spots. The costa of the hindwings is washed with sordid (dirty) whitish and there is a little white dash across the cell, as well as a long whitish streak from the subcostal area to the tornus.[3]