Group of risii. Mandibles each with distinct dorsal and ventral margins, the upper edentate (except for preapical angle), the lower one with small, serial, spaced teeth, or crenulate, or smooth. Intercalary tooth of mandibular apex arises from well beyond midlength of ventral apical tooth. Preapical angle usually well marked. Mesonotal disc with a blunt anterior rim, or none. Petiolar node pointed or narrowly rounded at apex. This seems to be a rapidly speciating group centered in SE Asia, but extending to the Philippines and mainland New Guinea; species are risii, tua, agilis, brevis, incultus, modicus, strigatellus and peracer.