Key to genera of Sericothripinae

1. Metasternal plate with deep U- or V-shaped invagination at anterior margin; pantropical (Figs 10, 13)......... Hydatothrips

-. Metasternal plate with anterior margin transverse or with shallow invagination (Figs 53–59)........................... 2

2. Metascutal sculpture with no microtrichia, sculpture lines usually longitudinal (Figs 47–51); tergites III–VI with few or no microtrichia on median discal area (Figs 76–79); worldwide....................................... Neohydatothrips

-. Metascutal sculpture with many microtrichia, sculpture lines predominantly transverse; tergites III–VI fully covered medially with microtrichia; Holarctic only................................................................ Sericothrips