Key to species of the genus Striatanus (male)

1. Ventral process of male pygofer in lateral view nearly straight and very long, with nearly one fourth its length extending beyond pygofer apex (Fig. 24) ..................................................................................... Striatanus tibetaensis

- Ventral process of male pygofer in lateral view curved dorsad and short, extending to or slightly beyond pygofer apex ............................................................................................................................................................................... 2

2. Ventral process of male pygofer in lateral view slightly curved dorsad (Fig. 14), with sinuate ledge in apical part (Fig. 20); aedeagal shaft in lateral view with pair of stout digitate processes pointing to base of aedeagus besides paired anterior processes at midlength (Fig. 16) ............................................................................. Striatanus dentatus

- Ventral process of male pygofer in lateral view strongly curved dorsad, without ledge; aedeagal shaft in lateral view with only paired anterior processes near midlength...................................................................................................... 3

3. Ventral process of male pygofer in lateral view of uniform width and apex rounded (Fig. 10); apical half of aedeagal shaft in lateral view curved cephalad, with small denticle distad of anterior process (Fig. 6) .... Striatanus curvatanus

- Ventral process of male pygofer in lateral view gradually tapered apically and apex somewhat truncate (Fig. 42); apical half of aedeagal shaft in lateral view nearly straight, without denticle distad of anterior process (Fig. 35)........ .............................................................................................................................................. Striatanus erectus sp. nov.