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Patissa lactealis is a moth in the Crambidae family. It was described by C. Felder, R. Felder and Rogenhofer in 1875. It is found in Sri Lanka.
Description
Wingspan of male is 20mm. Male white colored, with fuscous brown irrorations. Fore wings with obscure subbasal brown line. There are prominent curved antemedial line. The postmedial line nearly straight from costa to vein 3, then recurved to costa and enclosing two black spots on discocellulars in a figure-of-8 shaped mark, angled outwards on vein 2, and oblique to inner margin. A minutely dentate submarginal brown line and series of specks found on cilia. Hind wings pure white, with a brown lunule on inner margin above angle, and brown line from vein 2 to inner margin near anal angle.
Wingspan of female 22mm. Female much irrorated with brown. Fore wings with retracted figure-of-8 shaped portion of the postmedial line and discocellular specks obsolescent. The submarginal line whitish. Hind wings pure white.