Key to the species of Odontochrydium

1. Median area of mesoscutum with two longitudinal ridges (Figs 6D, 7D), medially with transversally enlarged foveae (Figs 3A– 3B); punctation on metasoma with scattered, large punctures (Fig. 6A – 7A); Kenya, Saudi Arabia ......................................................................................................... O. bicristatum sp. nov.

- Median area of mesoscutum without longitudinal ridges (Fig. 2D), medially with contiguous, reticulate punctures (Figs 5D, 9D); punctation on metasoma evenly punctate (Figs 2A, 4A, 5A, 8A, 9A)....................................... 2

2. Lateral margin of pronotum almost straight (Fig. 8D); pits of metasomal tergite 3 pit row deep, large, somewhere confluent (Figs 8F, 9F); areas anterior and posterior to pit row in lateral view forming distinct concave angle (Figs 8E, 9E); malar space short (1.0 × MOD); South India ............................................................... O. xui sp. nov.

- Lateral margin of pronotum distinctly bisinuate (Fig. 2D); pits of metasomal tergite 3 pit row shallow, small, distinctly separate (Figs 2F, 4F); areas anterior and posterior to pit row in lateral view continuous with each other (Figs 2E, 4E); malar space long (1.3 × MOD); Afrotropical, widespread........................................................... O. irregulare