Lethe siderea , the scarce woodbrown, is a species of Satyrinae butterfly found in the Indomalayan realm. The species was first described by George Frederick Leycester Marshall in 1880."Lethe Hübner, " at Markku Savela's Lepidoptera and Some Other Life FormsWeymer, G. 1910-1911. 4. Familie: Satyridae. In: Seitz, A. (Ed.), Die Gross-Schmetterlinge der Erde. Stuttgart, A. Kernen. 5: 185-225. It is legally protected in India under Schedule II of the Wild Life (Protection) Act, 1972.
Subspecies L. s. siderea Sikkim to West China L. s. kanoi Esaki & Nomura, 1937 Formosa
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