Ochosternus, Candeze, 1863

Key to Ochosternus of Lord Howe Island

1. Antennomere 3 expanded, triangular or apicolaterally lobed ( Figs 25–26 View FIGURES 25–26 , 36 View FIGURES 35–38 ); pronotum with lateral depressions and anterior angles visible from above ( Figs 27 View FIGURES 27–29 , 37 View FIGURES 35–38 ); mesoscutellum flat or concave and sparsely punctured ( Figs 27 View FIGURES 27–29 , 37 View FIGURES 35–38 )............. 2

- Antennomere 3 not expanded ( Figs 6–7 View FIGURES 5–7 ); pronotum without lateral depressions and anterior angles hidden by lateral swelling of pronotal disc ( Fig. 8 View FIGURES 8–10 ); mesoscutellum convex and densely punctured ( Figs 1, 3 View FIGURES 1–4 , 8 View FIGURES 8–10 ).................... O. howensi s Lea

2. Lateral depressions of pronotum elongate ( Fig. 37 View FIGURES 35–38 ); dorsum reddish-brown; anterior margin of frontoclypeus carinate ( Fig. 25 View FIGURES 25–26 ); anterior margin of labrum convex ( Fig. 25 View FIGURES 25–26 ) (antennomeres 3–10 apicolaterally lobed in male, female unknown)........................................................................................... O. goodyeri new species

- Lateral depressions of pronotum circular ( Fig. 27 View FIGURES 27–29 ); dorsum dark brown; anterior margin of frontoclypeus not carinate ( Fig. 25 View FIGURES 25–26 ); anterior margin of labrum truncate or slightly concave ( Fig. 25 View FIGURES 25–26 ) (antennomeres 3–10 triangular in female, male unknown)..................................................................................... O. huttoni new species