Key to the male of known species in Andropromachus (not including A. tonkinensis)

1. Abdominal tergites I–VIII unarmed................................................................ A. bicolor

- Abdominal tergites I–VIII with spines..................................................................... 2

2. Pronotum with one pair of spines............................................................. A. ynau sp. nov.

- Pronotum with three pairs of spines....................................................................... 3

3. Between the compound eyes with 2 spines...................................................... A. guangxiense

- Between the compound eyes without spines................................................................ 4

4. Occipital with 6 spines......................................................................... A. scutatus

- Occipital with 4 spines.................................................................... A. gulinqingensis