Key B (Subgenus Xenopygina)

1 Gonostylus with large lobe on inner side at base of spines...................................................... 2

- Gonostylus without lobe on inner side..................................................................... 4 2 Lobe very long and near the middle............................................ Sc. hastata (Johannsen), (Fig. 9 A) - Lobe distinct, but not unusually long...................................................................... 3 3 Lobe near the apex, with 3 spines................................................. Sc. paradoxa (Frey), (Fig. 9 B) - Lobe in the middle of gonostylus, with 2 spines.................................. Sc. subfratercula sp. n. (Fig. 9 C–F) 4 Gonostylus with spines in the middle of inner side (with or without apical spines); c often short, = ½ w................. 5 - Gonostylus with a few spines on or near the apex; c longer ½ w................................................ 14 5 Gonostylus with one spine in the middle of inner side only............... Sc. ventrospinula Mohrig & Mamaev (Fig. 15 C) - Gonostylus with more than one spine in the middle of inner side................................................6 6 Gonostylus with 2–5 spines, spines in the middle of inner side unpaired; apex more or less lobe-like divided, gonostylus con-