Abstract
The leafhopper genus Opsius Fieber, 1866 is revised for the Kingdom of Saudi Arabia. Seven species are treated, including three that previously were reported by Dlabola (1979), O. pallasi (Lethierry, 1874), O. tigripes (Lethierry, 1876), and O. versicolor (Distant, 1908). Opsius heydeni (Lethierry, 1876), O. richteri Dlabola 1960, and O. scutellaris (Lethierry, 1874) are reported for the first time from the Kingdom. A new species, O. wilsoni El-Sonbati, sp. nov. is described from the southwestern region of the Kingdom of Saudi Arabia. A key to the species of Opsius of the Kingdom is also provided.