EN
Tetramorium galaticum Menozzi, 1936, new status and Tetramorium hippocratis Agosti & Collingwood, 1987, members of Tetramorium semilaeve complex, are redescribed based on new materials from Greece and western Turkey. Detailed description of gyne and male is given for the first time. Two new species of this complex with all castes are described: Tetramorium kephalosi (Greece and Croatia) and Tetramorium bellerophoni (Turkey). Differential diagnoses from T. semilaeve, colour photos of all castes and male genitalia are given.