Kolla

Feng, Ling & Zhang, Yalin, 2015, Leafhopper genus Kolla Distant (Hemiptera: Cicadellidae: Cicadellinae) with descriptions of four new species from China, Zootaxa 3999 (3), pp. 430-438 : 431-432

Key to species of the genus Kolla from China (males)

1. Color pale; with median black spot on hind margin of pronotum…............................. K. ceylonica (Melichar)

-. Markings not as above …............................................................................... 2

2. Forewing with oblique red stripes…................................................ K. hoozanensis (Schumacher)

-. Markings not as above …............................................................................... 3

3. Pygofer process following ventral margin of pygofer to its apex…....................... K. atramentaria (Motschulsky)

-. Pygofer process curved obviously before pygofer apex......................................................... 4

4. Base of aedeagal shaft undivided, only apex split into two lobes…............................................... 5

-. Base of aedeagal shaft entirely split into two lobes …......................................................... 6

5. Pygofer process extending posteriorly beyond hind margin of pygofer..................... K. xiannvdongana Yang & Li

-. Pygofer process not extending posteriorly as far as hind margin of pygofer…................... K. dilate Kuoh & Cheng

6. Plates concave near midlength of outer margin…............................................................ 7

-. Plates concave near midlength of inner margin…............................................................ 8

7. Lobe base of aedeagal shaft wide and nearly at right-angle................................ K. emphysematosa sp. nov.

-. Lobe base of aedeagal shaft not as above…................................................. K. zijingae Cai & He

8. Pronotum black with a narrow transverse undulate pale line near anterior margin..................... K. insignis Distant

-. Pronotum not as above …............................................................................... 9

9. Apex of aedeagus significantly inflated…................................................... K. petalina sp. nov.

-. Apex of aedeagus not as above…........................................................................ 10

10. Apex of aedeagus double hook-like…................................................... K. lunulata Li & Wang

-. Apex of aedeagus not as above…........................................................................ 11

11. Face with longitudinal black stripes….................................................. K. rhabdoma Yang & Li

-. Markings not as above…............................................................................... 12

12. Pygofer obviously narrowing toward apex…............................................................... 13

-. Pygofer not obviously narrowing toward apex…............................................................ 14

13. Lobes of aedeagal shaft slender ….................................................... K. pentistigma Yang & Li

-. Lobes of aedeagal shaft wide…...................................................... K. nigrifascia Yang & Li

14. Hind margin of pygofer almost straight................................................. K. fusciosigna Yang & Li

-. Hind margin of pygofer convex or concave…............................................................. 15

15. Lobe base of aedeagal shaft elongate…................................................... K. prolongata sp. nov.

-. Lobe base of aedeagal shaft not elongate…................................................................ 16

16. Pygofer strongly produced…......................................................... K. elongatula (Melichar)

-. Pygofer not strongly produced…........................................................................ 17

17. Pygofer posterior margin smoothly convex…................................................ K. paulula (Walker)

-. Pygofer posterior margin slightly concave…................................................ K. procerula sp. nov.