Antennal scapes relatively long. Dorsum of head deeply punctate. Relatively short scapes. Pronotum unsculptured apart from hair-pits. Head colour black and antennae as dentulata .
Petiole node more elevated and more angular than the other forms .
Dorsal alitrunk completely sculptured. Node of petiole massive. Petiole in profile a thick scale, tapering dorsally. Mandibles without a lamelliform extension of the inner margin. Colour dark red-brown to black, lighter on extremities, yellow antennal funiculi, shiny.