The Perilampidae of the United Arab Emirates and Yemen (Hymenoptera: Chalcidoidea) Author Darling, D. Christopher Department of Natural History, Royal Ontario Museum, 100 Queen’s Park, Toronto, Ontario, Canada M 5 S 2 C 6 & Department of Ecology and Evolutionary Biology, University of Toronto, Toronto, Ontario, Canada M 5 S 3 B 2 Author Yoo, Jeong 0000-0002-4269-6953 Department of Natural History, Royal Ontario Museum, 100 Queen’s Park, Toronto, Ontario, Canada M 5 S 2 C 6 & Department of Ecology and Evolutionary Biology, University of Toronto, Toronto, Ontario, Canada M 5 S 3 B 2 & https: // orcid. org / 0000 - 0002 - 4269 - 6953 text Zootaxa 2021 2021-08-11 5020 1 101 129 journal article 10.11646/zootaxa.5020.1.5 1175-5326 5223041 9E9FBF89-8923-433D-AB91-DE67AFEF742F Key to the species of Perilampus from the UAE and Yemen 1 Mesoscutum with raised scale-like tubercle ( Figs 3A, 3C , arrow); body strongly iridescent in color; prepectus wide ( Figs 3B, 3D )............................................................................ P. auratus species group, 2 - Mesoscutum without raised scale-like tubercle ( e.g. 4B); body black in color, in some species with weak iridescent reflections on mesonotum; prepectus narrower ( Figs 4I , 6F , 8G , 10D, 10J )................................................. 3 2(1) Mesosoma iridescent green and blue, tubercle with iridescent red and yellow margin ( Fig. 3A ); clypeus transverse ( Fig. 2C ); Gt3 smooth................................................................. P. ardens Yoo and Darling n. sp. - Mesosoma cupreous with lateral lobes blue dorsad ( Fig. 3C ); clypeus more quadrate ( Fig. 2F ); Gt 3 punctuate..................................................................................... P. awbalus Yoo and Darling n. sp. 3(1) Ocellar triangle wide, median ocellus advanced ( Figs 6D , 8E , 10B, 10H ); pronotum as wide as or wider than prepectus ( Figs 6F , 8G ); scutellum smoothly rounded at apex ( Figs 6B , 8B , 11A, 11F )........................................... 4 - Ocellar triangle narrow, median ocellus not advanced ( Fig. 4F ); pronotum narrower than prepectus ( Fig. 4I ); scutellum usually bilobed at apex ( Fig. 4B )........................................................ P. khor Yoo and Darling n. sp. 4(3) Petiole with distinctly raised scale ( Figs 8G , 10D, 10J , arrow); interocellar region with shallow groove along midline ( Figs 8E , 10B, 10H ); prepectus narrow, with long ventral strap and a row of alveolae ventrad ( Figs 8G , 10D, 10J , arrow); propodeum with small foveae surrounding spiracles, lateral plicae weak ( Figs 8C , 10E, 10K ). Male: aedeagus with a pair of spines ( Figs 9D, 9H , 11E, 11K , arrow)............................................................ P. tristis species group, 5 - Petiole without raised scale ( Fig. 6G ); interocellar region without shallow groove along midline ( Fig. 6D ); prepectus wider, with short ventral strap without a row of alveolae ventrad ( Fig. 6F , arrow); propodeum with large foveae surrounding spiracles, lateral plicae distinct ( Fig. 6G ). Male: aedeagus without spines.......................... P. microgastris Ferrière, 1930 5(4) Postmarginal vein equal in length or shorter than stigmal vein ( Fig. 8D ); suture between prepectus and pronotum distinct ( Fig. 8G ); midlobe of mesonotum with wider interspaces ( Figs 8B , 9A, 9E )..................... P. rainerius (Argaman), 1990 - Postmarginal vein longer than stigmal vein ( Figs 10F, 10L ); suture between prepectus and pronotum indistinct ( Figs 10D, 10J ); midlobe of mesonotum with narrower interspaces ( Figs 11A, 11F ).............................................. 6 6(5) Mesonotum with strongly coriarious interspaces, and scutellum with blue iridescence ( Fig. 11A ); propodeum sculpture imbricate ( Fig. 10E ). Male: sculpture laterad clypeus coriarious ( Fig. 11C ); scape stout, length slightly less than 5× width above radicle ( Fig. 11D ).............................................................. P. yemenensis Yoo and Darling n. sp. - Mesonotum with weakly coriarious to nearly smooth interspaces, and both scutellum and mesoscutum with blue iridescence ( Fig. 11F ); propodeum sculpture nearly smooth ( Fig. 10K ). Male: sculpture laterad clypeus smooth ( Fig. 11H ); scape more elongate, length greater than 5× width above radicle ( Figs 11I, 11J )................ P. houbaraensis Yoo and Darling n. sp.