New data on the distribution of the genus Roeseliana Zeuner, 1941 (Orthoptera, Tettigoniidae, Tettigoniinae) in the southwestern Balkans, with description of R. epirotica n. sp. Author Lemonnier-Darcemont, Michèle Groupement d’Études entomologiques Méditerranée (G. E. E. M.), PO BOX 60 GR- 48060 Parga (Greece) lemonniergeem@free.fr Author Darcemont, Christian Groupement d’Études entomologiques Méditerranée (G. E. E. M.), PO BOX 60 GR- 48060 Parga (Greece) darcemont@free.fr text Zoosystema 2023 2023-07-26 45 14 445 450 journal article 59549 10.5252/zoosystema2023v45a14 f51797fb-dd17-45d3-a90d-726c12c35f18 1638-9387 8200298 4A49B696-2E7F-437E-8368-A361B82C13AE KEY TO SPECIES OF ROESELIANA ZEUNER , 1941 IN THE SOUTHWESTERN BALKANS Females 1. Sternum 6 and 7 with bumps ................................................................................. R. bispina ( Bolivar, 1899 ) — Sternum 6 and 7 not modified .................................................................................................................... 2 2. Subgenital plate trapezoidal in shape, wider than high, the lobes truncated horizontally. Narrow and shallow excision between the two lobes ............................................................................................ R. epirotica n. sp. — Subgenital plate widened with lobes slightly pointed. Deep and large excision of the subgenital plate ......... 3 3. Lobes of subgenital plates almost triangular in shape. Excision of the subgenital plate reaching beyond the middle .............................................................................................................. R. roeselii (Hagenbach, 1822) — Lobes more rounded on external part. Excision of the subgenital plate reaching at most to the middle .......... ............................................................................................................................ R. ambitiosa ( Uvarov, 1924 ) Males 1. Last tergite indented over a narrow width. Internal tooth of cerci longer than width of cercus at the point of insertion of the tooth. Tooth bent forward ...................................................................................... R. roeselii — Last tergite indented over a large width. Internal tooth of cerci as most as long as the width of cercus at the point of insertion of the tooth. Tooth not bent, more rounded .................................................................... 2 2. Titillators slightly curved ............................................................................................................. R. ambitiosa — Titillators strongly curved with the apex in the shape of a beak ................................................................... 3 3. A very few number of spines, only located on the apex of the titillators ............................... R. epirotica n. sp. — A larger number of spines on the titillators, from the base to the apex ............................................ R. bispina