New and little known crickets from Espiritu Santo Island, Vanuatu (Insecta, Orthoptera, Grylloidea, Pseudotrigonidium Chopard, 1915, Phaloriinae and Nemobiinae p.p.)

The cricket fauna of Espiritu Santo Island (Vanuatu) has been sampled during the SANTO 2006 biological survey. About 50 cricket species have been collected and observed in the field. In the present paper, cricket species belonging to Pseudotrigonidium Chopard, 1915, Phaloriinae and to troglobitic Nemobiinae are studied, and their habitat characterized according to specimen observations in the field. Six new species are described, Pseudotrigonidium personatum n. sp., Phaloria faponensis n. sp., P. nigricollis n. sp., P. pentecotensis n. sp., P. walterlinii n. sp. and Cophonemobius faustini n. sp. Podoscirtus chopardi Willemse, 1925 is transferred to the genus Phaloria Stål, 1877 and redescribed, while Phaloria chopardi (Willemse, 1951) from the Carolines islands is renamed P. willemsei Desutter-Grandcolas, 2009 to avoid homonymy. The calling song of P. chopardi is described.