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.