TABLE 1. Key to the species of Mantohelea .
| 1. | Fore femur slightly swollen (Figure 2.5). Apex of fore tibia without prolongation | M . sinica n. sp |
| -. | Fore femur greatly swollen. Apex of fore tibia with distinct prolongation | 2 |
| 2. | Palpal segment 4 slightly shorter than palpal segment 3 | M. laca (Meunier, 1904) |
| -. | Palpal segment 4 almost 2 times shorter than palpal segment 3 | M. gedanica Szadziewski, 1988 |
TABLE 2. Key to the species of Gedanohelea.
| 1. | Veins M 1 and M 2 strongly divergent (Figure 4.2) | 2 |
| -. | Veins M 1 and M 2 slightly divergent (Figure 5.2) | 3 |
| 2. | Vein M 1 reaching wing margin at acute angle, palpal segment 3 spherical, claws of all legs short | G. wirthi Szadziewski, 1988 |
| -. | Vein M 1 reaching wing margin exactly at right angle (Figure 4.2), palpal segment 3 cylindrical, claw of foreleg long | G. fushunensis n. sp |
| 3. | Tarsomere 5 of foreleg as long as combined length of tarsomeres 2-4 | G. succinea Szadziewski, 1988 |
| -. | Tarsomere 5 of foreleg distinctly shorter than combined length of tarsomeres 2-4 | 4 |
| 4. | Palpal segment 3 spherical | G. loewi Szadziewski, 1988 |
| -. | Palpal segment 3 cylindrical | G. liaoningensis n. sp. |
