Bolitogyrus concavus Brunke (A–C), B. rufomaculatus (Shibata) (D, E, G), B. depressus Cai et al. (F), B. taiwanensis (Hayashi) (G–I) and B. tumidus Brunke (J–L). Aedeagus in parameral view (A, D, G, J), aedeagus in lateral view showing expansion of the paramere (arrow) (B), apex of aedeagus in lateral view (E, F, H, K), peg setae of paramere (C, G, I, L). Scale bar: 0.5 mm.