An overview of the Ephydridae (Diptera) of Saudi Arabia Author Dawah, Hassan A. Author Ahmad, Syed K. Author Abdullah, Mohammed A. Author Zatwarnicki, Tadeusz text Zootaxa 2019 2019-12-17 4711 3 401 445 journal article 24562 10.11646/zootaxa.4711.3.1 9f235b62-9469-46ae-9fc0-9a39bd53b690 1175-5326 3586476 EF990EE4-6D69-41DE-A7ED-6C3B5141B106 Key to genera and species of Psilopini from the Saudi Arabia 1. Arista at most with 3-4 dorsal rays; distance between reclinate and larger proclinate fronto-orbital setae greater than between reclinate seta and medial vertical seta; setae generally pale................... Scoliocephalus monochaeta Steyskal, 1968 - Arista with at least 5-6 dorsal rays; reclinate and proclinate fronto-orbital setae much closer together than reclinate seta and medial vertical setae; setae generally dark..................................................................2. 2 Vein R 2+3 close to costa beyond end of vein R 1 ; crossvein dm-cu with sharp angle at middle............................................................................................. Clanoneurum cimiciforme ( Haliday, 1855 ) - Vein R 2+3 well separated from costa; crossvein dm-cu mostly straight or shallowly arched, not angulate.................3. 3. Pedicel conical, broader apically, without dorsoapical lobe, dorsoapical seta weak (at most 1/3 as long as basal flagellomere); basal flagellomere from 2- 4X as long as high................................. Ceropsilopa longicornis ( Lamb, 1912 ) - Pedicel short and subtriangular, with dorsoapical lobe and bearing well-developed dorsoapical spine (at least half as long as basal flagellomere); basal flagellomere at most twice as long as high.............................................4. 4. One strong facial seta; pedicel with dorsoapical spine strong and nearly as long as basal flagellomere; presutural supra-alar seta moderately developed, length smaller than anterior notopleural seta..................... Psilopa nilotica ( Becker, 1903 ) - Two strong facial setae; pedicel with dorsoapical spine weak and at most 1/3 as long as basal flagellomere; presutural supra-alar seta well developed, length greater than anterior notopleural seta................................. Diasemocera Bezzi