21. Dolichopus bigeniculatus Parent, 1926

References. Negrobov 1991: 99 (no material provided).

Material examined. 1♀, Sakhalin Is., near Yuzhno-Sakhalinsk, 27.06.1956, Violovich ; 3♀, Sakhalin Is., Anivsky District, Urozhainoe, 21, 27.06.1973, Logvinovskii ; 1♂, Sakhalin Is., 16 km W Yuzhno-Sakhalinsk, near Chekhov Mt., 19.08.1973, Logvinovskii ; 1♀, Sakhalin Is., 16 km W Yuzhno-Sakhalinsk, near Chekhov Mt., 15.07.1973, Zlobin ; 1♀, Sakhalin Is., Susunaisky mountain range, 9.09.1973, Zlobin ; 1♀, Sakhalin Is., 16 km W Yuzhno-Sakhalinsk, near Chekhov Mt., 7.09.1974, Zlobin ; 1♀, Sakhalin Is., 8 km N Yuzhno-Sakhalinsk, 1.08.1973, Zlobin ; 1♀, Sakhalin Is., 8 km N Yuzhno-Sakhalinsk, 15.08.1973, Zlobin ; 3♀, Sakhalin Is., near Novo-Aleksandrovsk, 26.07.1974, Zlobin ; 1♀, Sakhalin Is., 25 km SW Yuzhno-Sakhalinsk, riverside Lyutoga, 1.08.1982, Shamshev ; 4♀, Sakhalin Is., 9 km S Nevelsk, 23.07.1982, Shamshev ; 3♀, Sakhalin Is., near Yuzhno-Sakhalinsk, 5– 6.07.1982, Shamshev ; 22♀, Sakhalin Is., 29 km SW Yuzhno-Sakhalinsk, near Urozhainoe, 13.07.1982, Shamshev ; 11♀, Sakhalin Is., 38 km W Pyatirechye, 28.07.1982, Shamshev .

Distribution. Type locality: China, Shanghai, “Zi-Ka-Wei” (= Xujiahui). Palaearctic: China (Beijing, Henan, Shaanxi, Shandong), Japan, Russia (Khabarovsk, Primorye, Sakhalin); Oriental: China (Anhui, Jiangsu, Sichuan, Zhejiang). First reliable record from Sakhalin.