Stenus songxiaobini. 28 male sternite VIII 29 male sternite IX 30 male tergites IX, X 31, 32 aedeagus 33 apical portion of paramere 34 expulsion hooks 35 female sternite VIII 36 female tergites IX, X 37 valvifers. Scale bars: 33–34: 0.1 mm; 28–32, 35–37: 0.25 mm.