Krisna

Zhang, Yalin, Zhang, Xinmin & Dai, Wu, 2008, Three new species of the genus Krisna Kirkaldy (Hemiptera: Cicadellidae: Iassinae) from China, with a checklist of the genus, Zootaxa 1783, pp. 40-60 : 44-45

Key to species of the genus Krisna based on male adults from China

[Neither specimens nor descriptions of male genital characteristics of Krisna indicata (Walker) and Krisna minima Baker are available; therefore they are not included]

1. Ocelli placed close to adjacent eye at distance less than half diameter of ocellus (fig. 23); vertex with two anterior transverse black spots (fig. 6) ..... ............................ ........... .............. ........... K. strigicollis (Spinola)

- Ocelli placed slightly away from adjacent eye by distance equal to or more than half diameter of ocellus (figs 17–22, 24, 25); vertex without black spots (figs 1–5, 7, 8).................................................................2

2. Male pygophore with long ventral process extended to caudal margin and short pointed process at middle of ventral margin at each side (fig. 53) .................................................... Krisna nigromarginata Cai & He

- Male pygophore only with long ventral process extended to caudal margin at each side.............................3

3. Male with ventral pygophore process spiculate in distal half (figs 73, 74) ....... K. rufimarginata Cai & He

- Male with ventral pygophore process not spiculate in distal half (figs 27, 38, 49, 87, 97)........................... 4

4. Aedeagus in lateral aspect with ventral margin distinctly concave ............................. K. sherwilli (Distant)

- Aedeagus in lateral aspect with convex or straight ventral margin ............................................................ 5

5. Ventral pygophore process with spine or projection near base (figs 49, 97)...............................................6

- Ventral pygophore process without basal spine or projection .....................................................................8

6. Ventral pygophore process with short spine; aedeagal shaft with strongly concavely excavated dorsal mar- gin ...................................................................................................................................... K. kirbyi ( Baker)

- Ventral pygophore process with long projection (figs 49, 97); aedeagal shaft narrowed gradually to apex, without strongly concavely excavated dorsal margin..................................................................................7

7. Basal projection of ventral pygophore process longer than half length of pygophore process (fig. 49);

aedeagal shaft symmetrical at apex (figs 47, 48) ............................................................ K. furcata sp. nov. - Basal projection of ventral pygophore process less than half length of pygophore process (fig. 97); aedeagal shaft asymmetrical at apex (fig. 93) .......................................................... K. viridula Li & Wang 8. Aedeagal shaft broadly rounded at base in lateral view, without angular process; ventral pygophore process not sinuate near apex. ...........................................................................................................................9

- Aedeagal shaft with angular process at base in lateral view (fig. 88); ventral pygophore process sinuate near apex (fig. 87) ................................................................................................... K. viraktamathi sp. nov.

9. Frontoclypeus with a small rounded knob between antennae (fig. 17); aedeagal shaft robust especially near base (fig. 29); male with hind margin of eighth sternite convex (fig. 33). ....... K. concava Li & Wang

- Frontoclypeus smooth, without knob (fig. 19); aedeagal shaft elongate (fig. 35); male with hind margin of eighth sternite slightly concave (fig. 42) ................................................................. K. daiyunensis sp. nov.