Key to Nazeris species in Xizang

1 Head with umbilicate punctation (Fig. 2D)................................................................. 2

- Head with non-umbilicate punctation (Fig. 2E).............................................................. 8

2 Abdomen with fine microsculpture (Fig. 3A)........................................ N. xizangensis Hu & Li, 2016

- Abdomen lacking microsculpture (Fig. 4A)................................................................. 3

3 Male sternite VII with posterior margin prominent at middle (Hu et al. 2016: 477, Fig. 16)........................... 4

- Male sternite VII with posterior margin excised at middle (Figs 5A, 6A).......................................... 5

4 Ventral process of aedeagus with V-shaped excision at apex in ventral view (Hu et al. 2008: 91, Fig. 5).......................................................................................... N. motuensis Hu, Li & Zhao, 2008

- Ventral process of aedeagus with very narrow excision at apex in ventral view (Hu et al. 2016: 477, Fig. 18).......................................................................................... N. biwenxuani Hu & Li, 2016

5 Male sternite VII with narrow and deep posterior excision at middle (Hu & Pan, 2018: 148, Fig. 3); dorso-lateral apophyses of aedeagus nearly straight in ventral view (Hu & Pan, 2018: 148, Fig. 5)....................... N. zhifeii Hu & Pan, 2018

- Male sternite VII with wide and shallow posterior excision at middle (Fig. 5A); dorso-lateral apophyses of aedeagus curved inward in ventral view (Fig. 6C)......................................................................... 6

6 Dorso-lateral apophyses of aedeagus long, extending beyond apex of ventral process (Hu et al. 2008: 92, Fig. 10)...................................................................................... N. tangi Hu, Li & Zhao, 2008

- Dorso-lateral apophyses of aedeagus short, not reaching apex of ventral process (Fig. 6C)............................ 7

7 Male sternite VIII with triangular posterior excision (Fig. 5B); ventral process of aedeagus with apical concave at apex in ventral view (Fig. 5C)..................................................................... N. jifuensis sp. n.

- Male sternite VIII with V-shaped posterior excision (Fig. 6B); ventral process of aedeagus with acute apex in ventral view (Fig. 6C).................................................................................. N. wenxuani sp. n.

8 Head with unique punctation, shaped like sunflower seed (Fig. 2A).............................................. 9

- Head with round punctation (Fig. 2E).................................................................... 10

9 Abdomen with fine microsculpture on all tergites (Fig. 3A); ventral process of aedeagus very broad, with small excision at apex in ventral view (Fig. 3D).................................................................. N. mirabilis sp. n.

- Abdomen lacking microsculpture (Fig. 4A); ventral process of aedeagus narrowed near apical third with acute apex in ventral view (Fig. 4D)....................................................................... N. dinggyensis sp. n.

10 Male sternite VII with shallow postero-median impression, on either side of this impression with a tuft of dense dark setae (Fig. 8A)............................................................................................... 11

- Male sternite VII lacking postero-median impression and tuft of dense dark setae (Fig. 9A).......................... 12

11 Ventral process of aedeagus with acute apex in ventral view (Fig. 7C)................................ N. gladius sp. n.

- Ventral process of aedeagus with round apex in ventral view (Fig. 8C)........................... N. gyirongensis sp. n.

12 Ventral process of aedeagus with small excision at apex in ventral view (Hu et al. 2016: 476, Fig. 12).............................................................................................. N. zhujianqingi Hu & Li, 2016

- Ventral process of aedeagus with round apex in ventral view (Fig. 9C)........................... N. yadongensis sp. n.