Key to Taiwanese species of Antocha Osten Sacken

1. Thoracical pleuron dark gray. Abdomen dark brown to black................................................... 2

- Thoracical pleuron brownish or yellowish. Abdomen yellowish gray, brown or dark brown........................... 3

2. General body coloration dark brown. Pseudosutural fovea surrounded by contrasting yellow area. Coxae reddish brown, legs brown.................................................................. Antocha (Antocha) taiwanensis n. sp.

- General body coloration black. Pseudosutural fovea surrounded by same dark gray color as rest of thorax. Coxae dark brown to blackish. Male legs black, female legs brown................................ Antocha (Antocha) styx Alexander, 1930

3. Most antennal flagellomeres spindle-shaped with long pubescence.................. A. (A.)? streptocera Alexander, 1949

- Antennal flagellomeres elongate or oval, not spindle-shaped.................................................... 4

4. Thoracical pleuron brownish yellow. Abdomen yellowish gray or yellowish brown..................................................................................................... Antocha (Antocha) bifida Alexander, 1924a

- Thoracical pleuron brownish, covered with dense gray pruinosity. Abdomen dark brown............................................................................................ Antocha (Antocha) gracillima Alexander, 1924b