Key to the species of the genus Schmidtiana in the Philippines

1 Antennae uniformly brownish........................................................................... 2

- Antennae brownish, with four to five black apical antennomeres................................................ 4

2 Elytra uniformly purplish black.......................................................................... 3

- Elytra purplish black, with large yellowish humeral spots...................................... S. ilocana (Schultze)

3 Pronotum uniformly black.......................................................... S. legrandi Morati & Huet

- Pronotum largely reddish brown................................................... S. boundanti Vives & Niisato

4 Pronotum black, with brownish sides...................................................................... 5

- Pronotum uniformly black including sides................................................. S. gertrudis Hüdepohl

5 Pronotum in both sexes strongly tuberculate near middle of sides, with sides dilated in an almost straight line to middle in apical half, elytra brownish or blackish, variable, uniformly or partly of the same color.................. S. palawana (Schultze)

- Pronotum bluntly rounded near middle of sides in male, sharply tuberculate, though sides dilated in an arcuate line to middle in female; elytra uniformly brown.............................................................. S. sasajii Niisato