Male: Fastigium of vertex fairly strongly compressed, sulcate above, concave in profile, not raised at apex. Pronotum without lateral carinae or feebly subcarinate. Spine of fore coxae well-developed. Fore tibiae with about 5-6 external spurs, including 2 apical ones. Mid tibiae with about 11-13 external spurs. Hind femora unarmed. Hind tibiae with about 70-100 external dorsal spines and 3 apical spurs on each side. Fore wings with distinct bifurcate or occasionally three-branched. Rs, which is free from MA. Hind wings extending beyond fore wings by between third and half length of latter. Tenth abdominal tergite unmodified. Supra-anal plate very broad, as in figure 2, showing tendency to form 3 posterior angles. Cerci as in figure 1. Subgential plate as in figure 3.