Key to species of latifrons -group from China (males)

1. Hind tibia with strong apical pv setae; cercal plate with 1 median apical process and 2 papillae in posterior view ........................................................................................ B . tridigitata Fan &Chen in Fan et al., 1984a

- Hind tibia without apical pv setae; cercal plate only with 1 median apical process in posterior view........ 2

2. 3 rows of upcurved subvibrissal setulae; 2 pairs of interfrontal setae; costal vein bare on ventral surface; hind tibiae 3 av, 4-5 ad, 4 pd, 2 pv .................................................................... B. cercocerata (Deng, 1985)

- 5 rows of upcurved subvibrissal setulae (only 2 rows of upcurved subvibrissal setulae in Hennig); 3 pairs of interfrontal setae; costal vein setulose before humeral break on ventral surface; hind tibiae 2 av, 3 ad, 3 pd, 3 pv ........................................................................................................... B. latifrons (Zetterstedt, 1845)