SUMMARY
Polyommatus (Agrodiaetus) alibalii is a new butterfly species which was described by Frederic Carbonell in 2015. In the Carbonell’s article, since the descriptive information about the species is limited, a further redescription study has been aimed for more detailed identification the species. This study was conducted in two stages with the field works in Kirksu Highland in Geben village of Andirin district of Kahramanmaras province in Turkey in July and August in 2016 and 2017, and then laboratory works in the Zoology Laboratory at Mustafa Kemal University in Hatay, Turkey. In the field, behaviors of the adults have been observed and recorded in their habitats, and eight male and five female specimens of the species were collected for laboratory works. In this paper, the external morphology and genital structure of the male and female of the species were described in detail. In addition to P. alibalii, the male genital preparations of the species of P. theresiae (Schurian et al., 1992), P. iphigenia (Herrich-Schaffer, 1847), P. wagneri (Forster, 1956) and P. eurypilos (Gerhard, 1851) were prepared.