New data on the genus Wiedemannia Zetterstedt (Diptera: Empididae) from the Caucasus with description of four new species Author Kustov, Semen Author Zherebilo, Danil text Zootaxa 2015 4032 4 351 369 journal article 10.11646/zootaxa.4032.4.1 1459e41f-b82d-4c88-be4d-ee86e329f9c7 1175-5326 243485 AFEF8567-B7C6-4F54-AC51-4C990389BF1D Wiedemannia ( Wiedemannia ) caucasica Joost ( Fig. 3 ) Wiedemannia caucasica Joost, 1981 : 186 . Material examined . RUSSIA : Adygea Republic, Caucasian State Nature Biosphere Reserve (4), 25.vii.2013 , S. Kustov ( 1 ♂ ). Krasnodarskiy Territory, River Malaya Laba (10), 24.v.2014 , D. Zherebilo ( 3 ♂ , 5 ♀); northern slope of Rocky Ridge (22), 24.v.2014 , D. Zherebilo ( 3 ♂ , 5 ♀). Karachay-Cherkess Republic, env. Phiya (15), 11.viii.2013 , D. Zherebilo ( 5 ♂ , 15 ♀); same data, V. Gladun ( 3 ♂ , 7 ♀). GEORGIA : Lechkhumi ridge (41), 29.iv.2014 , D. Zherebilo ( 14 ♂ , 21 ♀); env. Lahepa (23), 29.iv.2014 , D. Zherebilo ( 4 ♂ , 4 ♀); Mingrelia (28), 2.v.2014 , D. Zherebilo ( 3 ♂ , 1 ♀); same data, 6.v.2014 , D. Zherebilo ( 3 ♂ , 5 ♀); ridge Ofitsari (30), 828 m a.s.l., 4.v.2014 , D. Zherebilo ( 5 ♂ , 9 ♀); same data, 6.v.2014 , D. Zherebilo ( 1 ♂ ); env. Zedakinchha (34), 9.iv.2015 , A.V. Zherebilo ( 2 ♂ , 1 ♀); env. Opitara (35), 10.iv.2015 , A.V. Zherebilo ( 1 ♂ ); env. Chkumi (36), 11.iv.2015 , A.V. Zherebilo ( 2 ♂ , 3 ♀); env. Namohvani (37), 15.iv.2015 , A.V. Zherebilo ( 4 ♂ ); env. Mukhuri (42), 17.iv.2015 , A.V. Zherebilo ( 6 ♂ , 9 ♀); env. Norio (46), 18.iv.2015 , A.V. Zherebilo ( 1 ♂ ); Lechkhumi ridge (41), 19.iv.2015 , A.V. Zherebilo ( 6 ♂ , 9 ♀); env. Orhvi (39), 20.iv.2015 , A.V. Zherebilo ( 5 ♂ ). ABKHAZIA : River Bzyb (11), 11.vii.2013 , D. Zherebilo (1 ♀). Diagnosis . Wiedemannia (s.str.) caucasica differs by the gena equal to eye height, acrostichals divergent around the prescutellar depression, 5 pairs of dorsocentrals with interspersed shorter setae, olive-brown scutum with blue pruinescence on prescutellar depression, fore femur without strong anterior setae apically; pterostigma indistinct and elongate; clasping cercus unilobed, extending to tip of phallus, broader at base, without basal process. Distribution. Caucasus: Russia (Adygea Republic, Krasnodarskiy Territory, Karachay-Cherkess Republic), Abkhazia, Georgia . Remarks . Joost (1981) described this species from the Sochi River ( Russia , Krasnodarskiy Territory), but in the Catalogue of Palaearctic Diptera ( Chvála & Wagner 1989 ) the species was mistakenly indicated from the territory of Georgia . Therefore W. caucasica is noted from the territories of Georgia and Abkhazia for the first time. This commonly collected species is known from submontane and mountain rivers from altitude 0–1700 m a.s.l. and active from April to August.