| Summary: | A preliminary detective survey for the hymenopteran insect fauna of Jazan Lake dam region, Southwest Saudi Arabia, was carried out for one year from January 2018 to January 2019 using mainly sweep nets and Malaise traps. The survey revealed the presence of three hymenopteran Superfamilies (Apoidea, Vespoidea and Evanioidea) representing 15 species belonging to 10 genera of 6 families (Apidae, Crabronidae, Sphecidae, Vespidae, Mutillidae, and Evaniidae). The largest number of species has belonged to the family Crabronidae is represented by 6 species under 2 genera. While the family Apidae, is represented by 2 species under 2 genera. Family Vespidae is represented by 2 species of one genus. While, the rest of the families Sphecidae, Mutillida, and Evaniidae each is represented by only one species and one genus each. Eleven species are predators, two species are pollinators and two species are parasitics. Note for each family was provided, and species was provided with synonyms and general and taxonomic remarks and their worldwide geographic distribution and information about their economic importance are also included. All species were photographed with dorsal and lateral views.
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