Nacaduba subperusia, the violet 4-lineblue, is a butterfly in the family Lycaenidae. It was described by Pieter Cornelius Tobias Snellen in 1896. It is found in the Indomalayan realm.The upperside is violet-blue, while the underside ground colour is brown or greyish.The underside has white transverse lines, submarginal striae, post-discal and tornal spots. Identification requires examining the male genitalia

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