Stenus sauteri Bernhauer, 1907
BL: 3.6~5.2mm; FB: 1.9~2.2mm;
Macropterous; body moderately shining, with antennae moderately long, slender. Head and abdomen black; pronotum and elytra dark red; labrum dark red; legs light yellow except for knees dark brown; third abdominal tergite with four distinct longitudinal keels at base; sixth abdominal tergite with three distinct longitudinal keels at base.
Distribution: China (Shanghai), Japan, Korea, Russia.