Bolitogyrus caesareus (Bernhauer) (A–C), B. proximus (Cameron) (D–G), B. temburong (Brunke) (H–J) and B. rufipennis (Cameron) (K–M). Aedeagus in parameral view (A, D, H, K), median lobe in lateral view (B, F, I, L), peg setae of paramere (C, G, J, M). Scale bars: 0.5 mm (A–B, D–F, H–I, K–L), 0.1 mm (C, G, J, M).