A complete description of the adults, pupa and larva of S. brachycladum is given and a lectotype selected for this species. The similarity between S. brachycladum and S. rubrithorax is extensively covered from S. rubrithorax. The taxonomic position of S. rubrithorax within the subgenus Hemicnetha is studied, a neotype is selected for this species and S. conviti is sunk as a synonym of S. paynei; and a lectotype is selected for S. paynei.