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 17–18 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

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