Brachypogon

Alwin-Kownacka, Alicja, Szadziewski, Ryszard & Szwedo, Jacek, 2016, Biting midges of the tribe Ceratopogonini (Diptera: Ceratopogonidae) from the Middle East, with keys and descriptions of new species, Zootaxa 4079 (5), pp. 551-572 : 558

Key to species of Brachypogon

1. Wing with both radial cells obliterated.................................................................... 2.................................................................................. subgenus Brachypogon

- Wing with two distinct radial cells........................................................................ 6...................................................................................... subgenus Isohelea

2. Gonostylus short, 1.5–1.8 times shorter than gonocoxite...................................................... 3

- Gonostylus long, nearly as long as gonocoxite.............................................................. 4

3. Parameres well developed, readily visible......................................... B. (B.) afifi Boorman & Harten

- Parameres indistinct, barely visible............................................. B. (B.) obesus Szadziewski et al.

4. Apical portion of aedeagus slender............................................ B. (B.) yarimii Boorman & Harten

- Apical portion of aedeagus broad......................................................................... 5

5. Parameres as long as aedeagus...................................................... B. (B.) vitiosus (Winnertz)

- Parameres distinctly shorter than aedeagus...................................... B. (B.) arabicus Szadziewski et al.

6. Gonostylus deeply bifurcate................................................... B. (I.) freidbergi Dominiak et al.

- Gonostylus simple.................................................................................... 7

7. Aedeagus triangular, with divided apex......................................... B. (I.) aethiopicus (Clastrier et al.)

- Aedeagus tongue-like, with simple blunt apex................................. B. (I.) vanharteni Szadziewski et al.