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 Key to species of Wiedemannia from the Caucasus 1 Gena wide, more than 1/2 of eye height................................................................... 2 - Gena narrow, less than 1/3 of eye height.................................................................. 3 2 Pterostigma rounded, very large and distinct. Width of gena slightly more than 1/2 of eye height. Clasping cercus elongate, projecting well beyond tip of phallus, narrower at mid length and long slender basal process projecting anteriorly ( Fig. 2 )............................................................................. W. ( Chamaedipsia ) braueri (Mik) - Pterostigma indistinct and elongate. Width of gena equal to eye height. Clasping cercus unilobed, shorter, extending to tip of phallus, broader at base, without basal process ( Fig. 3 )............................... W. ( Philolutra ) caucasica Joost 3 Acrostichal setae extending only to third dorsocentral seta.................................................... 4 - Acrostichal setae extending around prescutellar depression................................................... 8 4 Fore femur with strong anterior setae apically. Terminalia as in Figure 17 .............. W. ( Eucelidia ) zetterstedti (Fallén) - Fore femur without strong anterior setae apically........................................................... 5 5 Notopleuron with blue pruinescence. Clasping cercus unilobed or with broad not slender lobes....................... 6 - Notopleuron without blue pruinescence. Clasping cercus with anterior lobe slender, digitiform....................... 7 6 Clasping cercus broad, mitten-shaped, lobes not slender ( Fig. 4 ).......................... W. ( Philolutra ) chvali Joost - Clasping cercus long and unilobed, perpendicular to epandrium ( Fig. 14 ).............. W. shamshevi Kustov & Zherebilo 7 Lobes of clasping cercus orientated at right angles, L-shaped; digitiform lobe nearly directed vertically ( Fig. 7 )...................................................................................... W. ( Philolutra ) klausnitzeri Joost - Lobes of clasping cercus more broadly orientated, beyond right angles ( Fig. 8 )............ W . kustovi Sinclair & Shamshev 8 Fore femur without strong anterior setae apically........................................................... 9 - Fore femur with strong anterior setae apically............................................................. 13 9 Clasping cercus undivided............................................................................ 10 - Clasping cercus bilobed.............................................................................. 11 10 Mesonotum with triangular-shaped blue pruinescence on prescutellar depression. Clasping cercus elongate, narrowed to apex ( Fig. 1 ).................................................................. W. ( Chamaedipsia ) beckeri (Mik) - Mesonotum completely brownish. Clasping cercus rounded ( Fig. 15 )................... W. sinclairi Kustov & Zherebilo 11 Mesonotum with light greyish-blue pruinescence on notopleuron. Pleura with light blue pruinescence. Clasping cercus with shiny black anterior lobe ( Fig. 5 )............................................... W. ( Philolutra ) fallaciosa (Loew) - Mesonotum completely brownish. Pleura with violet-blue pruinescence. Clasping cercus with dull anterior lobe........ 12 12 Clasping cercus with anterior lobe short, pointed, bearing cluster of apical setae; dorsal process subtriangular, inner margin clothed in dense setae ( Fig. 13 ).............................................. W. ( Philolutra ) pseudovaillanti Joost - Clasping cercus with anterior lobe prolonged, digitiform and slender, without cluster of apical setae; dorsal process anvil- shaped, inner margin without dense setae ( Fig. 16 ).................................... W. ( Philolutra ) vaillanti Joost 13 Dorsocentrals without intermediate setae interspersed among primary setae...................................... 14 - Dorsocentrals with intermediate setae interspersed among primary setae........................................ 16 14 Fore femur with 1 strong anterior seta on apical third. Clasping cercus yellowish basally, long and wide, rounded apically ( Fig. 9 )......................................................................... W. ( Chamaedipsia ) lota Walker - Fore femur with 2–3 strong anterior setae on apical third. Clasping cercus dorsally brown to black, narrowed apically... 15 15 Clasping cercus with apical finger-like prolongation ( Fig. 6 ).................................. W. ivkovicae sp. nov. - Clasping cercus evenly narrowed apically ( Fig. 10 )........................................ W. nartshukae sp. nov. 16 Mesonotum with triangular-shaped blue pruinescence on prescutellar depression. Scutellum with only 2 long scutellar setae. Clasping cercus with broad apex ( Fig. 11 )................................................. W. ossetiana sp. nov. - Mesonotum with light brown pruinescence on prescutellar depression. Scutellum with 2 long and 2–3 short marginal setae. Clasping cercus tapered apically, apex narrow ( Fig. 12 )..................................... W. pseguashae sp. nov.