A revision of bupresticida species group of Cerceris Latreille, 1802 (Hymenoptera: Crabronidae: Philanthinae) of the Western Palearctic region, with the description of Cerceris ammonia, a new species from Egypt Author Malash, Alyaa A. 0000-0001-6053-0693 Entomology Department, Faculty of Science, Cairo University, PO Box 12613, Giza, Egypt. alyaa_adel91@cu.edu.eg Author Edmardash, Yusuf A. 0000-0002-3365-0822 Entomology Department, Faculty of Science, Cairo University, PO Box 12613, Giza, Egypt. edmardash@cu.edu.eg Author Gadallah, Neveen S. Entomology Department, Faculty of Science, Cairo University, PO Box 12613, Giza, Egypt. text Zootaxa 2024 2024-05-09 5448 1 1 28 http://dx.doi.org/10.11646/zootaxa.5360.3.8 journal article 10.11646/zootaxa.5448.1.1 1175-5326 11231152 E5657AAC-A82F-44F7-A57B-CE3ECA8F963D Key to species of Cerceris bupresticida group of western Palearctic region. 1. Hindcoxa without carina ventrally; male gastral T 6 and S 6 without postero-lateral processes; scutum and propodeum partly or entirely yellow ( Figs 16A , 17C ).............................................. Cerceris palmetorum de Beaumont - Hindcoxa with ventral carina along its whole length; at least male gastral S 6 with postero-lateral processes or teeth; scutum entirely black, without any yellow....................................................................... 2 2. Body black and red to dark reddish or ferruginous, without yellow ( Fig. 2A, B ); free margin of clypeal middle lobe of female shallowly, broadly emarginate ( Fig. 2C, D )........................ Cerceris ammonia Malash, Edmardash & Gadallah - Body black and yellow or whitish yellow, sometimes with some red; free margin of clypeal middle lobe of female truncate or nearly so............................................................................................ 3 3. Propodeum sparsely punctate adjacent to propodeal enclosure, punctures separated by more than one puncture diameter; body with some red markings................................................................................ 4 - Propodeum closely punctate adjacent to propodeal enclosure; body with or without red markings..................... 5 4. Female clypeus with minute, emarginate lamella just above free margin, free margin with four distinct teeth ( Fig. 12B ); T 1 distinctly short, globular ( Fig. 11A, C ); male S 6 only with postero-lateral process ( Fig. 11E ); male T 2 short, non-petiolate ( Fig. 11A ); female S 5 straight postero-medially ( Fig. 13B )..................................... Cerceris hathor Pulawski - Female clypeus without lamella, free margin of middle lobe wavy, with lateral minute tooth on each side ( Fig. 19A ); T 1 distinctly long ( Figs 18B , 20A ); male T 6 and S 6 with postero-lateral processes or spine ( Fig. 21D ); male T 2 elongate, narrowed at base ( Fig. 20A ); female S 5 distinctly emarginate postero-medially ( Fig. 19D ).............. Cerceris tricolorata Spinola 5. Propodeal enclosure longitudinally ridged throughout ( Fig. 8B ) or longitudinally ridged at base, then smooth and shiny ( Fig. 5B ), posterior corner of male S 6 only dentate; S 5 of female (see Fig. 8D ); body with extensive yellow ( Fig. 7 A-C)...................................................................................... Cerceris bupresticida Dufour - Propodeal enclosure smooth and shiny ( Fig. 14D ); male posterior corners of both T 6 and S 6 with dents or teeth; S 5 of female (see Fig. 15B ); pale parts of body (ivory-white) distinctly reduced ( Fig. 14A, B )............ Cerceris odontophora Schletterer