Key to the known species of Monasavuhygia

1. Antenniferous tubercles armed with short spiny projection; humeri with one stout conical protuberance; calli with deep hole, behind posterior third; anterolateral margins of pronotum with one conical protuberance; posterior half of connexival segments III–VI conspicuously swollen; hemelytral membrane absent; postocular tubercle hemispheric, faintly insinuate over the surface (Figs. 3, 6, 9)........................................................... M. incola sp. nov. (Solomon Islands)

- Antenniferous tubercles unarmed; humeri unarmed; calli lacking a hole behind posterior third; anterolateral margins of pronotum without conical protuberance; posterior half of connexival segments III–VI conspicuously swollen or not; hemelytral membrane absent or present; postocular tubercle slightly protuberant or lacking.................................... 2

2. Posterior half of connexival segments III–VI swollen; hemelytral membrane absent; postocular tubercle not tuberculate; head longer than 1.83 mm (Figs. 1, 4, 7)...................................... M. cordata Brailovsky, 1996 (Fiji Islands)

- Posterior half of connexival segments III–VI not swollen, flat; hemelytral membrane reduced to a small expansion; postocular tubercle hemispheric, slightly protuberant; head length less than 1.60 mm. (Figs. 2, 5, 8).... M. fodina sp. nov. (Fiji Islands)