FIGURES 13–22. Sexual characters. 13–18 male sternite VII 19, 20 male sternite VIII 21 female sternite VIII 22 valvifer 13 Dianous vietnamensis 14 D. rougemontianus 15 D. ruginosus 16 D. aerator 17, 21, 22 D. pseudaerator 18, 20 D in Notes on the Dianous aereus complex with description of a new species (Coleoptera, Staphylinidae)

FIGURES 13–22. Sexual characters. 13–18 male sternite VII 19, 20 male sternite VIII 21 female sternite VIII 22 valvifer 13 Dianous vietnamensis 14 D. rougemontianus 15 D. ruginosus 16 D. aerator 17, 21, 22 D. pseudaerator 18, 20 D. brevicornis. Scale bars: 0.25 mm.