Abstract
A new species of the genus Paragus Latreille is described, Paragus (Paragus) radjabii sp. nov. It is similar to P. com-peditus Wiedemann and P. hyalopteri Marcos-Garcia & Rojo. The head, abdomen and male genitalia of the new species are figured. A list of the species of Paragus known from Iran is provided, along with a distributional map of the species in Iran. Hoverflies of the genus Paragus are widely distributed in the Nearctic Region, but mostly occur in the Old World. The adults of Paragus species are small in size (2.5-6.5 mm), with different patterns of coloration and pubescence on the abdomen. The larvae of all species of this genus are known as predators of aphids and can be considered one of the significant factors in the biological control of aphids (Chambers 1986, 1988; Thompson & Ghorpade 1988; Carver 1989; Marcos-Garcia & Rojo 1994; Gavrilyuk et al. 2008).