Key to species of Brontispa

1. Anterior corners of pronotum subhorizontal and distinctly projecting laterally, not continuous with anterior margin through small denticle or notch (Figs 13, 20); frontoclypeus impuctate or finely punctate (Figs 12, 19); smaller species, length below 10 mm ................................................................................................. 2

- Anterior corners of pronotum weakly projecting laterally and forming continuous line with anterior margin (Fig. 5); frontoclypeus with several coarse punctures (Fig. 3); larger species, length 13 mm ............................. B. caledonica sp. nov.

2. Frontoclypeus without deep foveae (Fig. 12); antennomere II short, 0.3 × as long as antennomere I (Fig. 11); apex of elytra with sharp or denticulate sutural angle and emarginate apical margin; body yellow, frons brown, pronotum with apical dark patch, elytra either largely dark brown or yellow with central brown spot but never with stripes (Figs 9, 10); larger species, length 8.00– 9.50 mm .................................................................. B. longissima (Gestro, 1885)

- Frontoclypeus with pair of deep foveae apically (Fig. 19); antennomere II elongate, 0.8 × as long as antennomere I (Fig. 18); apex of elytra with straight sutural angle and broadly rounded lateral angle; body yellow, each elytron with dark brown stripe on rows 3–5 (Figs 16, 17); smaller species, length 5.10–6.80 mm ........................... B. veitchiae Gressitt, 1960