Atheta (Microdota) riparia Klimaszewski & Godin: 41 habitus in dorsal view 42 male tergite VIII 43 male sternite VIII 44 median lobe of aedeagus in lateral view 45 median lobe of aedeagus in dorsal view 46 female tergite VIII 47 female sternite VIII 48 spermatheca. Scale bar for habitus = 1 mm; remaining scale bars = 0.2 mm.