Lamprosema alphalis is a species of moth of the family Crambidae described by Pierre Viette in 1958. It can be found in Madagascar.
Its wingspan is 17âÂÂ18 mm, with a length of the forewings of 8-8.5 mm.
This species looks close to Dichocrocis alluaudalis but is considerably smaller. The holotype had been collected in western Madagascar, 45 km south of Morondava