New Records Of Hoverflies (Diptera, Syrphidae) From Ukraine. Iii. Pipizinae And Syrphinae Author Prokhorov, A. V. Author Popov, G. V. Author Zaika, M. I. text Vestnik Zoologii 2018 2018-06-01 52 3 241 250 http://dx.doi.org/10.2478/vzoo-2018-0025 journal article 10.2478/vzoo-2018-0025 2073-2333 6454739 Epistrophe olgae Mutin, 1990 (figs 19, 20, 23–25) M a t e r i a l e x a m i n e d. Ukraine . Kyiv Region : Potashnia env., 50.71 N 29.74 E , Tal River floodplain , 9.05.2016 , 1 ♀ ; Kotsiubynske env., 50.47 N 30.30 E , clearing in mixed forest, 17.04.2016 , 1 Ơ (A. Prokhorov). D i s t r i b u t i o n: uncertain, due to confusion with Epistrophe nitidicollis (Meigen, 1822) , already known from Norway , Sweden , Finland , France (Rhine valley in Alsace ), Switzerland and Far East of Russia ( Kamchatka Peninsula , Khabarovsk Region , Primorsky Region , Kuril Islands ( Mutin, 1990 ; Mutin & Barkalov, 1999 ; Speight, 2017); Ukraine (first record). Diagnosis. Epistrophe olgae is most similar to Epistrophe nitidicollis (figs 21, 22, 26– 28), having the second basal cell of wing 20% or more bare of microtrichia, mesoscutum brightly shining, undusted, and tergite 5 partly black ( Speight & Sarthou, 2017 ). Both sexes can be separated from it by the orange-brown arista (figs 23–25) (in E. nitidicollis , arista black or dark brown, as on figs 26–28) ( Speight & Sarthou, 2017 ), and the mesonotum shining with an olive or golden tint (in E. nitidicollis , the mesonotum shining black with a bluish tint) ( Mutin & Barkalov, 1999 ). Male can be distinguished from E. nitidicollis by the frons with a grey or golden ( Mutin, 1990 ) or faint yellow-gray dust (in E. nitidicollis , the frons with a distinct grey dust) (Bartsh et al., 2009; Speight & Sarthou, 2017 ); in the Ukrainian specimen of E. olgae , the frons with distinct golden dust (fig. 23), while in E. nitidicollis the frons with a yellowish-gray dust (fig. 26). Female differs from E. nitidicollis by the frons almost entirely dusted brownish-grey (in E. nitidicollis , the frons with a pair of brownish-grey dust spots, though these dust spots may be joined in the mid-line), the vertex pollinose with a brownish-grey dust, lateral to the ocellar triangle (fig. 25) (in E. nitidicollis , the vertex shining black, undusted, lateral to the ocellar triangle, as on fig. 28) ( Speight & Sarthou, 2017 ). In the Ukrainian specimen of E. olgae , the frons with a pair of almost separated (figs 24, 25), yellowish-grey dust spots (but the frons between these spots faintly pollinose, not shining), whereas in E. nitidicollis , these yellowish-grey dust spots are distinctly separated, and the frons between this pollinose spots is shining (figs 27, 28). Figs 19–22. Epistrophe olgae (figs 19–20) and E. nitidicollis (figs 21–22), Kyiv Region: 19, 21 — male habitus, dorsal view; 20, 22 — female habitus, dorsal view. Figs 23–28. Epistrophe olgae (figs 23–25) and E. nitidicollis (figs 26–28) from Kyiv Region: 23, 26 — male head, anterolateral view (arrow shows the dust on the frons); 24, 27 — female head, anterolateral view; 25, 28 — same, dorsal view (arrow shows the part of the vertex with (25) or without (28) dust). N o t e. It is noteworthy that the descriptions ( Mutin, 1990 ; Mutin & Barkalov, 1999 ) do not mention that E. olgae has an orange-brown arista. Mutin (1990) describes it as a brown arista, but it has not been included among distinctions of E. olgae from E. nitidicollis . This remarkable character (among others) clearly differentiates these two species among the Ukrainian specimens.