Fore femur with or without ventral spines. Male flagellum with flagellomere 10 elongate, longer than distal segments 11–13. Male flagellar plume well developed. Male aedeagus without spicules on ventral membrane; gonostylus elongate, simple ( Krzywiński 1995).
1. Fore femur with l or more ventral spines..........................................................................................2
– Fore femur without ventral spines.....................................................................................................3
2. Hind femur and tibia uniformly brown; gonostylus with blunt apex ............................................... .............................................................................................................. B. flavicornis ( Staeger, 1839)
– Hind femur and tibia yellow, with brown subapical and subbasal bands; gonostylus with sharply pointed apex ........................................................................ B. naseri Boorman & van Harten, 2002
3. Sternite IX of male genitalia very long; gonostylus with sharply pointed apex ................................ ...................................................................................... B. libanensis Alwin & Szadziewski sp. nov.
– Sternite IX of male genitalia short; gonostylus with blunt apex ..................................................... ........................................................................................... B. mellori Boorman & van Harten, 2002