Key to species of genus Cordax Burr, 1910 from China (males only)

1 Forceps nearly touching at base.......................................................................... 2

- Forceps widely separated at base........................................................................ 3

2 Forceps short and thick, inner tooth in apical half...................................... C. armatus (De Haan, 1842)

- Forceps long and thin, inner tooth in basal half........................................... C. claviger (Burr, 1917)

3 Body blackish brown; forceps straight, inner margin not serrated in basal half.............. C. unidentatus (Borelli, 1915)

- Body pale brown; forceps incurved, inner margin serrated in basal half........................... C. serratus sp. nov.