Birthana asmenopa is a moth in the family Immidae. It was described by Edward Meyrick in 1925. It is found in New Guinea.Birthana at funet.fi.
The wingspan is about 30 mm. The forewings are purple-blackish with a gently curved rather broad even deep orange fascia from the middle of the costa to three-fourths of the dorsum. There is a leaden-blue terminal line. The hindwings are blackish with a broad slightly curved transverse orange band occupying from before the middle to five-sixths of the wing, the anterior edge rather irregular.Exotic Microlep. 3: 133
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