Key to the male genitalia of Palaearctic Kiwaia- species

(The male of K. (E.) yadongensis sp. n. is unknown)

1. Phallus about as long as tegumen and uncus, with rounded apex and short lateral tooth, saccus 3 times longer than basal width (Figs 52, 53)............................................................................ K. (E.) ramulata

- Phallus from 1/2 to 2/3 length of tegumen and uncus, lateral tooth absent, saccus from 1.5 to 2 times longer than basal width (Figs 28–51)........................................................................................ 2

2. Ventral margin of valva with short process (Figs 45, 46).................................... K. (E.) montana sp. n.

- Ventral margin of valva without process (Figs 28–44, 47–51)................................................. 3

3. Saccus twice broader than valva in middle, about half of its length (Fig. 47)...................... K. (E.) medogia sp. n.

- Saccus as broad as valva in middle or narower, shorter than half length of valva................................... 4

4. Uncus twice longer than broad on 1/4 length, posterior margin with medail incision (Fig. 44)............. K. (E.) spinosa

- Uncus less than twice longer than broad on 1/4 length, posterior margin rounded.................................. 5

5. Apex of valva triangular, tapers to a thorn (Figs 48–51)...................................................... 6

- Apex of valva rounded or weakly tapered................................................................. 7

6. Sacculus narrow, saccus broad, apical thorn long (Fig 48)......................................... K. (E.) kumatai

- Sacculus broad, saccus narrow, apical thorn short (Figs 49–51)............................... K. (E.) povolnyi sp. n.

7. Saccus broad, extended far beyond top of pedunculus, phallus stout, broad (Fig. 38)........... K. (E.) nyingchiensis sp. n.

- Saccus narrower, slightly exceeds beyond top of pedunculus, phallus slender..................................... 8

8. Sacculus about as long as vincular process (Figs 42, 43)..................................... K. (E.) centrica sp. n.

- Sacculus longer than vincular process.................................................................... 9

9. Saccus abruptly cut (Figs 33–37)............................................................. K. (E.) kostjuki

- Saccus tapered..................................................................................... 10

10. Phallus with crescentic cornutus, sacculus broadened apically (Figs 39–41)................. K. (E.) septentrionala sp. n.

- Phallus without crescentic cornutus, sacculus pointed apically................................................ 11

11. Phallus comparatively narrow, valva extending to about half length of uncus (Figs 29–31)............. K. (E.) palaearctica

- Phallus comparatively broad, valva extending to the top of uncus............................................. 12

12. Apical arm of phallus with postrior margin broadly rounded, valva apically rounded (Fig. 28)............ K. (E.) dryosyrta

- Apical arm of phallus with postrior margin concave in middle, valva apically pointed (Fig. 32)..... K. (E.) mengdana sp. n.