Two new species of Lesteva Latreille, 1797 are described from South Siberia: L. dabanensis Shavrin, Shilenkov & Anistschenko, sp. n. from the Khamar-Daban and L. barguzinica Shavrin, Shilenkov & Anistschenko, sp. n. from the Barguzin mountain ranges. Habitus, mouthparts and genitalia are illustrated. New collecting records are provided for L. brathinoides Zerche, 2000 and L. sajanensis Zerche, 2000. A key to Lesteva species known from South Siberia is provided.
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