M a t e r i a l e x a m i n e d. Ukraine. Kyiv Region: Irpin env.: 50.50 N 30.28 E, Lyubka River floodplain, 17.04.2016, 2 Ơ; idem, 50.50 N 30.27 E, 11.04.2017, 1 Ơ, 1 ♀ (A. Prokhorov); Kotsiubynske env., 50.47 N 30.30 E, clearing in mixed forest, 13.05.2016, 1 ♀ (M. Zaika).

D i s t r i b u t i o n: southern Norway, Sweden and Finland, Germany (Lower Saxony, Baden-Würrtemberg), Poland, Russian Far East (Magadan Region, Khabarovsk Region, Amur Region, Primorsky Region), Iran (Wolff, 1998; Mutin, 2002; Kazerani et al., 2012; Vujić et al., 2013; Speight, 2017; Mielczarek, 2018); Ukraine (first record).

D i a g n o s i s. Pipiza accola belongs to P. luteitarsis species group, which is characterized by the smooth hind femora without paired ventral, longitudinal ridges at the distal end, as well as ventral part of basoflagellomere reddish (Vujić et al., 2008). There are only four species in this group known in Europe: P. accola, P. luteibarba Vujić, Radenković & Polić, 2008, P. luteitarsis Zetterstedt, 1843, and P. quadrimaculata (Panzer, 1804). Pipiza accola clearly differs from P. quadrimaculata by the narrow abdomen, absence of the pale spots on the tergite 3 and by lack of well defined marginal ridge of the abdomen. Pipiza accola is very similar to P. luteitarsis (fig. 6) and P. luteibarba, from which the male of P. accola (figs 1, 3) can be reliably distinguished from the features of genitalia (Vujić et al., 2008). The genitalia of the Ukrainian males of P. accola were dissected and compared with figures in Vujić et al. (2008, 2013). Female (figs 2, 4, 5) differs from P. luteitarsis by the sternite 5 noticeably wider than long (in P. luteitarsis, sternite 5 longer than wide). From similar P. luteibarba it differs by the basoflagellomere short, oval, slightly longer than wide (fig. 5) (in P. luteibarba, the basoflagellomere 1.5 times longer than wide), the frons broader than width of the eye at the level of the anterior margin of the pollinose lateral spots (dorsal view) (in P. luteibarba, the frons narrower than width of the eye at the level of the anterior margin of the pollinose lateral spots) (Vujić et al., 2013).