The Palaearctic genus Trachyusa Ruthe, 1854 (Braconidae: Alysiinae: Alysiini) is revised and one new species, T. nigrothoracica spec. nov., is described and fully illustrated. A key to the species is added. Lectotypes are designated of Alysia aurora Haliday, 1838 and of Trachyusa nigriceps Ruthe, 1854.

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Zoologische Mededelingen

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Naturalis journals & series

van Achterberg, C., & O'Connor, J. P. (1990). Revision of the Palaearctic genus Trachyusa Ruthe (Hymenoptera: Braconidae). Zoologische Mededelingen, 64(8), 107–112.