Key to males of Agnesiella from China

1. Setae not clustered on pygofer side.......................................................... A. ( Agnesiella), 2

- Setae clustered and usually divided into 2 groups on pygofer side................................. A. ( Draberiella) 11

2. Paramere with subapical protrusion....................................................................... 3

- Paramere without subapical protrusion................................................................... 10

3. Aedeagal shaft with incision on dorsal margin subapically in lateral view............... A. (A.) buysi Dworakowska, 1982

- Aedeagal shaft without incision on dorsal margin subapically in lateral view...................................... 4

4. Paramere with subapical protrusion (Fig. 67)......................... A. (A.) marginata Dworakowska, 1994 rec. nov.

- Paramere with 2 subapical protrusions..................................................................... 5

5. Paramere with caudal apex angle with upper subapical protrusion nearly equal to 90..... A. (A.) juglandis Chou & Ma, 1981

- Paramere with caudal apex angle with upper subapical protrusion slightly less than 180°............................. 6

6. Pronotum with T-shaped blackish patch on central area........................... A. (A.) nitobella (Matsumura, 1932)

- Pronotum without T-shaped blackish patch on central area..................................................... 7

7. Pronotum with single blackish patch on center of anterior margin............................................... 8

- Pronotum without single blackish patch on center of anterior margin............... A. (A.) lyraeformis (Matsumura, 1932)

8. Pronotum with blackish patches on central area near posterior margin............. A. (A.) matsumurai Dworakowska, 1982

- Pronotum without blackish patches on central area near posterior margin......................................... 9

9. Pronotum with pair of lateral blackish patches (Fig. 10)....................... A. (A.) protensa Huang & Zhang sp. nov.

- Pronotum with 2 pairs of lateral blackish patches................................. A. (A.) giranna (Matsumura, 1932)

10. Aedeagal shaft with ventral appendage nearly equal to 1/4 length of aedeagal shaft in lateral view (Fig. 87)................................................................................... A. (A.) recurva Huang & Zhang sp. nov.

- Aedeagal shaft with ventral appendage nearly equal to 1/2 length of aedeagal shaft in lateral view (Fig. 96).................................................................................... A. (A.) polita Huang & Zhang sp. nov.

11. Pygofer side with setae near ventral margin basally......................................................... 12

- Pygofer side without setae near ventral margin basally....................................................... 15

12. Pygofer side with long fine setae near posterior margin...................................................... 13

- Pygofer side without long fine setae near posterior margin.................................................... 14

13. Aedeagal shaft with subapical ventral margin irregularly undulated.................... A. (D.) sinuata Yan & Yang, 2019

- Aedeagal shaft with subapical ventral margin not undulated (Fig. 155).......... A. (D.) apiculata Huang & Zhang sp. nov.

14. Ventral appendage of aedeagal shaft with 2 digitiform branches (Fig. 141)......... A. (D.) exigua Huang & Zhang sp. nov.

- Ventral appendage of aedeagal shaft with 1 digitiform branch......................... A. (D.) latusa Yan & Yang, 2016

15. Pygofer appendage furcate............................................................................. 16

- Pygofer appendage not furcate.......................................................................... 17

16. Pygofer appendage trifurcate (Fig. 160)................................... A. (D.) tridigitata Huang & Zhang sp. nov.

- Pygofer appendage bifurcate................................................... A. (D.) rita Dworakowska, 1982

17. Pygofer appendage arising from posteroventral margin....................................................... 18

- Pygofer appendage arising from posterior margin........................................................... 26

18. Paramere with 2 subapical protrusions......................................... A. (D.) roxana Dworakowska, 1982

- Paramere with a subapical protrusion..................................................................... 19

19. Paramere with subapical protrusion nearly as long as caudal apex.............................................. 20

- Paramere with subapical protrusion small and distinctly shorter than caudal apex.................................. 22

20. Aedeagal shaft with bifurcate ventral appendage..................................... A. (D.) furca Yan & Yang, 2019

- Aedeagal shaft without ventral appendage................................................................. 21

21. Forewing with a dark brown patch at base (Figs 33, 37)........................ A. (D.) glabra Huang & Zhang sp. nov.

- Forewing without patch at base................................................. A. (D.) innota Yan & Yang, 2019

22. Aedeagal shaft with a distinctly lamellar extension dorsally in lateral view....................................... 23

- Aedeagal shaft without lamellar extension dorsally in lateral view...................... A. (D.) azra Dworakowska, 1994

23. Aedeagal shaft with digitiform ventral appendage directed distad in lateral view.................................. 24

- Aedeagal shaft with digitiform ventral appendage directed basad in lateral view................................... 25

24. Aedeagal shaft with apex narrowing gradually in posterior view (Fig. 182)........ A. (D.) stipitata Huang & Zhang sp. nov.

- Aedeagal shaft with subapex constricted in posterior view (Fig. 113)................ A. (D.) lata Huang & Zhang sp. nov.

25. Digitiform ventral appendage of aedeagal shaft slightly less than 1/2 as long as aedeagal shaft in lateral view (Fig. 112).......................................................................... A. (D.) gaura Huang & Zhang sp. nov.

- Digitiform ventral appendage of aedeagal shaft very short in lateral view................. A. (D.) erosa Yan & Yang, 2016

26. Paramere with subapical protrusion nearly as long as caudal apex.............................................. 27

- Paramere with subapical protrusion small and distinct shorter than caudal apex................................... 28

27. Pygofer side with long fine setae near posteroventral margin (Fig. 144)............ A. (D.) mitrata Huang & Zhang sp. nov.

- Pygofer side without long fine setae near posteroventral margin........................... A. (D.) aldera Thapa, 1984

28. Aedeagal shaft with distinctly lamellar extension dorsally in lateral view............... A. (D.) xantha Yan & Yang, 2016

- Aedeagal shaft without distinctly lamellar extension dorsally in lateral view...................................... 29

29. Aedeagal shaft with ventral appendage lamellar (Fig. 128)..................... A. (D.) eleganta Huang & Zhang sp. nov.

- Aedeagal shaft with ventral appendage not lamellar......................................................... 30

30. Aedeagal shaft with ventral appendage bifurcate............................................................ 31

- Aedeagal shaft with ventral appendage trifurcate........................................................... 32

31. Aedeagal shaft with middle part of dorsal margin serrated............................. A. (D.) ela Dworakowska, 1977

- Aedeagal shaft with dorsal margin smooth........................................ A. (D.) digita Yan & Yang, 2019

32. In lateral view, three branches of ventral appendage of aedeagal shaft each arising separately from common stem (Fig. 120)................................................................. A. (D.) longisagittata Huang & Zhang sp. nov.

- In lateral view, 2 outer branches of ventral appendage of aedeagal shaft with common stem separate from innermost branch (Fig. 104).......................................................... A. (D.) irma Dworakowska, 1977 rec. nov.