Ischyroptera bipilosa Pokorny, 1887.
Pokorny, E. (1887) (III.) Beitrag zur Dipterenfauna Tirols. Verhandlungen der Zoologisch-Botanischen Gesellschaft in Wien 37, 381-420, pl. 7. [post 1887.05.04]
Flowers visited: Potentilla (pers. comm. G. Van de Weyer in Speight 2010).
Flight period: from end of May to June (Speight 2010).
From the information currently available, this monotypic genus appears to be endemic to central Europe, only known from the Alps (France, Switzerland, Italy).
Adults are found in flight when snow melt has progressed far enough for patches of bare ground to be exposed; males hover at 2-3 m and settle on rocks (P. Goeldlin pers. comm. in Speight 2010).
Preferred environment: bare ground; calcareous, rocky moraine and talus slopes from 2400 m, with very sparse ground vegetation; has also been collected at 1600 m, in montane / subalpine, unimproved, calcareous grassland (pers. comm. G. Van de Weyer in Speight 2010).
unless otherwise stated