Key to males of Australian Amobia

1. Fronto-orbital and parafacial plates with silver microtomentum, upper mouthedge and gena with golden microtomentum (Fig. 6B, D, G); notopleuron with a distinct area of golden microtomentum (Fig. 6A) .................................................................................................. A. (s. str.) serpenta sp. nov.

– Fronto-orbital plate and parafacial plate both with golden or dull yellow microtomentum; gena with grey or golden microtomentum (Figs 2B, D, G, 4B, D, G); notopleuron without golden microtomentum (Fig. 2 A–B) ............................................................................................................. 2

2. Fronto-orbital plate with dull yellow microtomentum (Fig. 2 A–B, G); basicosta brown; male terminalia: cerci in lateral view broad in basal and distal 0.4 with distinct narrowing in middle 0.2 (Fig. 3B); in posterior view cerci straight and not curved away from one another (Fig. 3A) .................................................................................... A. (s. str.) auriceps (Baranov, 1935)

– Fronto-orbital plate with bright golden microtomentum (Fig. 4 A–B, G); basicosta yellow-brown; male terminalia: cerci in lateral view gradually tapering from base to tip (Fig. 5B, D); in posterior view cerci weakly curved away from one another (Fig. 5A, C).... A. (s. str.) burnsi (Malloch, 1930)