Six new species of Diostracus Loew (Diptera, Dolichopodidae) from Tibet.

Six species of Diostracus from Tibet are described as new to science: D.concavus sp. nov. , D.fasciculatus sp. nov. , D.laetus sp. nov. , D.polytrichus sp. nov. , D.strenus sp. nov. , and D.translucidus sp. nov. A key to the species from Tibet of the genus is provided. The distribution of the genus in Tibet is also discussed.