Diagnostic characters for workers of all species-groups outlined in this paper. Lateral view of mesosoma, petiole and postpetiole of a member of the hafahafa species-group (7), dorsal view of mesosoma, petiole and postpetiole of angulatus species-group (8), dorsal view of mesosoma, petiole and postpetiole of madecassus species-group (9), lateral view of mesosoma, petiole and postpetiole of madecassus species-group (10), lateral view of mesosoma, petiole and postpetiole of sikorai species-group (11). For details see main text.