Contributions to the cuckoo wasp fauna (Hymenoptera: Chrysididae) of Yemen with description of five new species and updated checklist

New data on the Chrysididae fauna from Yemen are presented. Based on recently collected material, eleven species are recorded for the first time in the country: Elampus afer (Mocsáry, 1889); Hedychridium scutellare (Tournier, 1878); Hedychrum coelestinum Spinola, 1838; Holophris coriacea (Dahlbom, 1850); Holopyga subglabrata Linsenmaier, 1994; H. vicissituda Linsenmaier, 1994; H. parvicavitale Linsenmaier, 1994; Chrysidea pumila (Klug, 1845); Chrysis elegantula Spinola, 1838; C. nilensis Linsenmaier, 1959; Chrysis robertsi Rosa, 2020. Notably, Elampus afer, Hedychrum coelestinum and Holophris coriacea, previously considered African species, are now documented in the Arabian Peninsula for the first time. Additionally, five species new to science are described: Hedychridium eudaimon sp. nov. (from Yemen and Saudi Arabia); Hedychrum harteni sp. nov.; Chrysis bilqis sp. nov. (leachii group); Chrysis felix sp. nov., and Chrysis yemenita sp. nov. (succincta group). Furthermore, the male of Trichrysis longispina (Mocsáry, 1912) is illustrated for the first time.