Key to genera of Sericothripinae

1. Usually micropterous, females rarely macropterous; metanotum with transverse rows of coarse microtrichia on posterior third (Fig. 77); abdominal tergites fully covered medially and laterally with dense rows of microtrichia, major setae arising submarginally (Fig. 78); tergal posterior margins with complete microtrichial comb ......... Sericothrips

-. Always fully winged; metanotum without transverse rows of microtrichia, sculpture longitudinal (Fig. 3); rows of discal microtrichia present only on lateral thirds of abdominal tergites (Fig. 5); tergal marginal comb either present or absent medially (Figs 5, 10, 72) .............................................................................................................................. 2

2. Metasternal anterior border with deeply U-shaped emargination, usually more than half as deep as length of this sclerite (Figs 6, 18) ................................................................................................................................... Hydatothrips

-. Metasternal anterior border transverse, or with shallow emargination (Figs 39, 43, 49, 71) .............. Neohydatothrips