Key to species of Xenogryllus

1. Dorsal disc of pronotum carinated laterally. Eyes higher than long in lateral view, occupying half of head height.......... 2

- Dorsal disc of pronotum not carinated laterally. Eyes as long as high in lateral view, restricted to dorsal third of head....... 4

2. Face almost flat in lateral view................................................... X. eneopteroides Bolívar, 1890

- Face rounded in lateral view............................................................................. 3

3. Face bulbous in lateral view. Size rather larger. Male genitalia: Pseudepiphallic lophi (Fig. 8F) ended by a small lamella, their inner margin almost straight, membranous.......................................... X. mozambicus Robillard n. sp.

- Face less rounded in lateral view. Size rather shorter. Male genitalia: Pseudepiphallic lophi (Fig. 8E) ended by a long conical apex and with a widened inner membranous margin........................... X. maniema Robillard & Jaiswara n. sp.

4. Male FWs well widened basally, forming a wide box around abdomen........................................... 5

- Male FWs not widened, as wide as abdomen........................................... X. lamottei Robillard n. sp.

5. Size larger (body length> 20 mm). Male genitalia: pseudepiphallic lophi strong, ended by a sharp apex with a dorsal preapical pointed expansion. Female subgenital plate posterior margin clearly indented...................................... 6

- Size smaller (body length <20 mm). Male genitalia: pseudepiphallic lophi very long and thin, ended by a lamella, without dorsal preapical pointed expansion. Female subgenital plate posterior margin not indented (Fig. 9B)...................................................................................................... X. marmoratus (Haan, 1844)

6. Male genitalia: Pseudepiphallic lophi with pseudepiphallic lophi forming curved elongate hooks widened apically (Fig. 8D). Female subgenital plate posterior margin indentation rounded laterally, as wide as long (Fig. 9C)................................................................................................. X. maichauensis Gorochov, 1992

- Male genitalia: Pseudepiphallic lophi straight apically. Female subgenital plate posterior margin indentation pointed laterally..................................................................................................... 7

7. Size larger. Male genitalia with larger pseudepiphallic sclerite; lophi proportionally smaller (Fig. 8I), fused only basally, separated by a deep indentation. Female subgenital plate posterior margin indentation very deep, longer than wide (Fig. 9G).................................................................................. X. transversus (Walker, 1869)

- Size smaller. Male genitalia with smaller pseudepiphallic sclerite; lophi fused on half of their length (Fig. 8H). Female subgenital plate posterior margin indentation weak, wider than long (Fig. 9E)......................... X. ululiu Gorochov, 1990