Key to species of the genus Glyptobasis

G. fraseri is excluded from the key since the type specimen is too damaged to determine characters.

1. Only one yellow band on mesothorax in lateral view (Figs. 1C and 17D)......................................... 2

- Two distinct yellow bands on meso and metathorax in lateral view (Figs. 4C; 10C; 19C)............................. 3

2. Labrum pale yellow with dark brown apical margin (Fig. 2B), male antenna slightly curved with small teeth on inner surface (Fig. 2A)............................................................................ G. cornuta Kimmins

- Labrum shiny dark brown to black (Fig. 17B), male antenna strongly curved in S-shape with well-developed teeth on inner surface (Fig. 17A).............................................................. G. spinicornis van der Weele

3. Labrum and clypeus pale brown (Figs. 15B; 19B)............................................................ 4

- Labrum and clypeus dominantly dark brown to black......................................................... 5

4. Pterostigma and legs reddish brown (Figs. 15A;C), male ectoproct with short and stout caudo-ventral processus, gx9+11 extensions at right angles curved with blunt-ended projection directed inwards at base in ventral view (as in Kimmins 1949:23, fig. 9)............................................................................... G. nugax (Walker)

- Pterostigma and legs dark brown to black (Figs. 19A;C), male ectoproct with small and thin caudo-ventral processus, gx9+11 extensions evenly curved without protuberance in ventral view (as in Kimmins 1949:23, fig. 9)......... G. weelei Kimmins

5. Frons shiny black without any marks (Figs. 10B; 12A)...................................... G. nigrifrons Kimmins

- Frons dominantly brown with lateral indistinct, yellowish spot below scapus (Figs. 4B; 7A)....... G. dentifera (Westwood)