Review of the genus Trichactia Stein (Diptera: Tachinidae) in the Palaearctic Region, with the description of a new species from Iran and the East Mediterranean

The genus Trichactia Stein, 1924 (Diptera: Tachinidae) is newly recorded from Iran and its Palaearctic species are reviewed. The new species Trichactia meridiana Ziegler & Gilasian, sp. nov. is described from Iran and the East Mediterranean. An identification key to the three known Palaearctic species of Trichactia , photographs of all species and illustrations of their male terminalia are provided. Intraspecific variation between different geographical populations of T . meridiana sp. nov. is discussed.