Taxonomic revision of the Western Palaearctic bees of the subgenus Pseudomegachile (Hymenoptera, Apiformes, Megachilidae, Megachile) Author Dorchin, Achik Author Praz, Christophe J. text Zootaxa 2018 2018-11-22 4524 3 251 307 journal article 27924 10.11646/zootaxa.4524.3.1 9c9571c7-60b7-403b-b5b9-d10530b90820 1175-5326 2610526 6E27E496-B896-49E0-8EF2-4BAA57F6B91D Megachile ( Pseudomegachile ) riyadhensis Alqarni, Hannan, Gonzalez & Engel 2012 Chalicodoma ( Pseudomegachile ) riyadhense Alqarni, Hannan, Gonzalez & Engel 2012 : 73 , ♀ ♂ , “ Saudi Arabia , Riyadh , Al Amariah , Majra Al-Gasim ”. Holotype ♀ , KSMA, paratypes ♀ ♂ , KSMA and SEMC. Distribution : Saudi Arabia , Israel . Note : M. riyadhensis is likely conspecific with M. rhodoleucura Cockerell 1937 , described from Zimbabwe ( Praz 2017 ). The female holotype of M. rhodoleucura is sculpturally identical with Megachile riyadhensis ( Alqarni, Hannan, Gonzalez and Engel, 2012 ) and differs from that species only in the coloration of the metasomal vestiture (it is fulvous in M. rhodoleucura and snow white in M. riyadhensis ). We follow Praz (2017) in refraining from putting M. riyadhensis in synonymy with M. rhodoleucura until the male of the latter is known. Pollen hosts : Specimens were collected on Blepharis ( Acanthaceae ) in Saudi Arabia ( Alqarni et al. 2012 ) and on Vitex (Verbenaceae) in Israel (A. Dorchin, pers. obs). Nesting biology : unknown. Material examined: ISRAEL AND PALESTINE : 1km S Almog 31°46’47’’N / 35°27’32’’E , - 280m , 0 4.05.2012, A. Dorchin leg.