Prothyma Hope 1838

Key to the Philippines subgenera of the genus Prothyma Hope, 1838

1. Body completely shiny greenish-blue colored............................................. Prothyma Hope, 1838

— Body not uniformly greenish-blue colored................................................................. 2

2(1) Labrum predominantly metallic in color, sometimes marginal edge slightly lightened; body length less than 10 mm .................................................................................... Symplecthyma Rivalier, 1964

— Labrum yellow or brown, rarely nearly black along middle, in latter case at least sides broadly bright.................. 3

3(2) Legs and basal four antennal segments brownish yellow; preapical dot forming an apical lunule, reaching the suture. Endophallus with long, spiral-shaped flagellum.............................................. Parasymplethyma subgen. nov.

— Tibiae and basal second to fourth antennal segment never brownish; preapical dot smaller.... Genoprothyma Rivalier, 1964