Key to males of Nazeris of Zhejiang Province, China

1 Apices of dorso-lateral apophyses extending beyond apex of median lobe......................................... 2

- Apices of dorso-lateral apophyses not reaching apex of median lobe............................................. 5

2 Posterior margin of 7th sternite distinctly prominent medially (Fig. 13); apex of median lobe in dorsal view tri-lobed (Fig. 15)................................................................................ N. parabrunneus sp. nov.

- Posterior margin of 7th sternite simple; apex of median lobe of male aedeagus in dorsal view not tri-lobed.............. 3

3 Emargination of 8th sternite wide and shallow; apex of median lobe in dorsal view bifurcate......................... 4

- Emargination of 8th sternite narrow and deep (Fig. 29); apex of median lobe in dorsal view not bifurcate (Fig. 30).......................................................................................... N. niutoushanus sp. nov.

4 Abdomen with fine and faint microsculpture only on apical 1/3 of the 7th tergite; dorso-lateral apophyses at midpoint with con- iform projection (Fig. 20)................................................................ N. furcatus sp. nov.

- Abdomen with fine and faint microsculpture on all the segments; dorso-lateral apophyses at midpoint without projection (Fig. 25)................................................................................ N. yanyingae sp. nov.

5 Median lobe in dorsal view notched apically............................................................... 6

- Median lobe in dorsal view acute apically.................................................................. 8

6 Median lobe in dorsal view distinctly narrowed near apical 1/3................................................ 7

- Median lobe in dorsal view not narrowed near middle (Fig. 50).............................. N. yandangensis sp. nov.

7 Dorso-lateral apophyses in lateral view narrowed apicad (Fig. 36)............................ N. shenshanjiai sp. nov.

- Dorso-lateral apophyses in lateral view widened apicad (Fig. 41).............................. N. nigritulus sp. nov.

8 Median lobe in dorsal view strongly narrowed from middle to apical 1/4, the apical 1/4 of median lobe as narrow as a needle..................................................................................... N. minor Koch, 1939

- Median lobe in dorsal view not narrowed strongly from middle to apical 1/4...................................... 9

9 Median lobe in dorsal view at apical 1/3 with a triangular outward prominence on each side (Fig. 45); dorso-lateral apophyses extending only to the middle of median lobe.............................................. N. tianmuensis sp. nov.

- Median lobe in dorsal view at apical 1/3 without prominence on each side; dorso-lateral apophyses extending at least to the apical 1/3 of median lobe.............................................................................. 10

10 Median lobe in dorsal view arrow-shaped: with outward triangular projection near apex.......... N. rougemonti Ito, 1996

- Median lobe in dorsal view without triangularly projection................................................... 11

11 Dorso-lateral apophyses in dorsal view without projection.................................. N. chinensis Koch, 1939

- Dorso-lateral apophyses in dorsal view with a small projection on each inner side................................. 12

12 Dorso-lateral apophyses in dorsal view at apical 1/3 with a small projection on each inner side (Fig. 55), median lobe arcuately widened near apex in dorsal view..................................................... N. jiulongshanus sp. nov.

- Dorso-lateral apophyses in dorsal view at midpoint with a small projection on each inner side, median lobe not widened in api- cal part in dorsal view................................................................................ 13

13 Median lobe in dorsal view distinctly constricted near middle, strongly widened at apical 1/3, then gradually narrowed apicad (Fig. 60)......................................................................... N. zhujingwenae sp. nov.

- Median lobe in dorsal view not constricted near middle..................................................... 14

14 Apical half of median lobe in dorsal view with straight and parallel lateral sides (Fig. 65); carina of prosternum extends to the anterior margin.................................................................. N. baishanzuensis sp. nov.

- Median lobe in dorsal view gradually narrowed apicad in apical part (Fig. 70); carina of prosternum does not reach anterior margin............................................................................... N. lijinweni sp. nov.