Key for Modicogryllini and regarding species from China (based on adult males)

1. Clypeus integrated, not divided.......................................................................... 2

- Clypeus divided as anteclypeus and postclypeus............................................................. 3

2. Lower margin of frontal rostrum straight or slightly concave.................. Genus Eumodicogryllus Gorochov, 1986 .................................................................... E. chinensis (Weber, 1801) comb. nov.

- Lower margin of frontal rostrum convex......................................... Genus Gryllodinus Bolívar, 1927 .................................................................................... G. jijilacus sp. nov.

3. Maxillary broad, outer margin curved....................................... Genus Modicogryllus Chopard, 1961 ................................................. Subgenus Modicogryllus (Promodicogryllus) Gorochov, 1986 ..................................................................... M. (P.) consobrinus (Saussure, 1877)

- Maxillary narrow, outer margin straight.................................................................... 4

4. Anterior margin of clypeus convex at the middle; no distinct yellowish transverse stripe between lateral ocelli............................................................................... Genus Turanogryllus Tarbinsky, 1940 ... 5

- Anterior margin of clypeus straight; ornamented with distinct yellowish transverse stripe between lateral ocelli................................................................................ Genus Svercacheta Gorochov, 1993 ... 7

5. Head without distinct stripes, dorsal disc of pronotum with large reddish-brown area......... T. rufoniger (chopard, 1925)

- Head with distinct stripes, dorsal disc of pronotum without large reddish-brown area................................ 6

6. Middle of frontoclypcal suture strongly convex; frontal rostrum wide, about four times wider than antennal scape......................................................................................... T. lateralis (Fieber, 1853)

- Middle of frontoclypcal suture slightly convex; frontal rostrum slightly narrow, about two times wider than antennal scape.............................................................................. T. eous Bergfy-Bienko, 1956

7. Apical field long, almost as long as pronotum, bearing more wing chambers.............. S. siamensis (Chopard, 1961)

- Apical field short, is about 2/3 the length of pronotum, bearing few wing chambers................................................................................................. S. semiobscurus (Chopard, 1961) comb. nov.