Systropus is a genus of bee flies in the family Bombyliidae. There are over 200 described species in the genus Systropus, found on every continent except Antarctica.

Species: 

• S. ammophiloides Townsend, 1901
• S. angulatus (Karsch, 1880
• S. arizonicus Banks, 1909
• S. basilaris Painter, 1963
• S. bicornis Painter, 1963
• S. dolorosus Williston, 1901
• S. lugubris Osten Sacken, 1887
• S. macer Loew, 1863
• S. macilentus Wiedemann, 1920
• S. nigripes Painter, 1963
• S. paloides Painter, 1963
• S. pulcher Williston, 1901
• S. rufiventris Osten Sacken, 1887
• S. sallei A. Costa, 1865
• S. semialbus Painter, 1963
• S. similis Williston, 1901
• S. vicinus Painter, 1963