In this study, the Saudi Arabian Thorictinae beetle species, Thorictus riyadhensis Háva & Abdel-Dayem, sp. nov., T. shadensis Háva & Abdel-Dayem, sp. nov., T. sharafi Háva & Abdel-Dayem, sp. nov., T. hanifahensis Háva & Abdel-Dayem, sp. nov. are described, illustrated, and compared with related species. Three other species: T. castaneus Germar, 1834; T. foreli Wasmann, 1894; and T. peyerimhoffi Chobaut, 1904 are excluded from the fauna of Saudi Arabia. A list of Thorictinae species from the Arabian Peninsula is provided.
Keywords: Thorictini; Thorictodes; Thorictus; Beetles; Saudi Arabia; Thaumaphrastini; new species; taxonomy.
Jiří Háva, Mahmoud S. Abdel-Dayem, Hathal M. Aldhafer.