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 MorondavaViette, P., 1958. Mémoires de l'Institut scientifique de Madagascar; Série E, Tomé IX, P.136-137: Pyrales de la région malgache nouvelles ou peu connues (Lepidoptera)
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