Key to Proamblia

1. Posterior lobe of pronotum entirely dark brown, except for yellow stripe along posterior margin (Fig. 2 A–B); endosoma with sclerite rather slender, not widened near apex (Figs. 8 A, B) ......................... Proamblia cunealis (Poppius)

- Posterior lobe of pronotum with distinct yellow, longitudinal stripe medially, contiguous with anterior lobe and posterior margin (Fig. 2 C–D); endosoma with sclerite distinctly widened near apex (Fig. 8 F, G) ..................................... ........................................................................................................................................ Proamblia elongata (Poppius)