Pipiza accola Violovitsh, 1985

(Figs. 8, 9, 23, 24)

Material studied (4ɗ 3Ψ): Russia: Коmsomolsk - na - Amure, Silinski park, 12.05.2001, ɗ Ψ, leg. and det. Mutin.

FNHM: Russia: Коmsomolsk - na - Amure, Silinski park 20.05.1986. ɗ leg. and det. Mutin, 11.05.1993. ɗ leg. and det. Mutin, 11.05.1985. Ψ leg. and det. Mutin; Sweden: UP [Uppland], 2001-05 -07.019, Järf. [Järfälla], Järvaf., S Säbysjön, RN10l8d 0-2-14, Prunus padus, ɗ leg. and det. H. Bartsch; UP, 2007-05-08.016, Upplands Bro, Bro, 500m S Smidö, RN10H13, Prunus padus, Ψ leg. and det. H. Bartsch.

This species is very similar to P. luteitarsis, from which it can only be reliably distinguished in the male sex using features of the male genitalia (Figs. 21–24). In the female, sternite 5 is noticeably wider than long (as in Fig. 14), whereas it is longer than wide in P. luteitarsis (Fig. 16). These features are figured by Wolff (1998), who recently records this species from Baden-Württemberg (Germany).

Distribution: Finland (Haarto & Kerppola, 2007), Sweden (Bartsch, pers. comm.), Germany (Niedersachsen, Baden-Württemberg), Russia, Siberia (Speight 2007).

Ecology (based on Speight 2007): preferred environment: forest; deciduous forest, along streams with Alnus and Fraxinus in Quercus /Carpinus/Ulmus forest (Wolff 1998), in association with Prunus padus close to water. Flowers visited: Prunus padus, Salix . Flight period: end April/mid May.