Key to species of Exphora

1. Metope long, 2.5 times as long as wide........................................................ E. longipennata

- Metope less than 2 times as long as wide...................................................................2.

2. Metope distinctly enlarged over clypeus at almost right angle, with 2 rows of black spots (between keels)..... E. fumivenosa

- Metope enlarged over clypeus with board obtuse, without black spots............................................ 3

3. Body greenish, fore wing with 15 apical cells....................................................... E. succinae

- Body yellowish-brown, fore wing with 18–19 apical cells...................................................... 4

4. Fore wing with dark brown transvers veins...................................................... E. perinetensis

- Fore wings uniformly coloured, without darker veins......................................................... 5

5. Apical part of aedeagus without long needle-like processes. Aedeagal processes obtuse curved or almost stright and prolonged.................................................................................................... 6

- Apical part of aedeagus with long needle-like processes directed dorsally.........................................7

6. Apical processes of aedeagus well developed, falcate, with denticles directed to each other...........................8

- Apical processes of aedeagus without denticles directed to each other. Aedeagus long and thin or wide and robust....... 10

7. Anal column short, placed in basal part of anal tube.................................................... E. similis

- Anal column long, placed in apical part of anal tube................................................. E. succinae

8. Apical process of aedeagus twice longer than subapical....................................................... 9

- Apical process of aedeagus as long as subapical...................................................... E. guerini

9. Aedeagus with 2 distinct bulges dorsally, ventral process weekly developed......................... E. constanti sp. n.

- Aedeagus without bulges, ventral process bird-head shaped...................................... E. stroinskii sp. n.

10. Aedeagus comparatively short, robust; apical margin of anal tube with deep incision..................... E. ifanadiensis

- Aedeagus very long; anal tube twice longer than wide with apical margin almost stright............................ 11

11. Aedeagal processes with abundant small denticles....................................... E. ambatolaonaensis sp. n.

- Aedeagal processes without small denticles...................................................... E. perinetensis