Checklist and new records of spiders (Araneae) from Cephalonia and Ithaka Islands (Greece)

A first checklist of the spiders (Araneae) of the Ionian islands of Cephalonia and Ithaka (Greece) is provided. Argiope bruennichi (Scopoli, 1772), Metellina merianae (Scopoli, 1763), Frontinellina frutetorum (C.L. Koch, 1835), Leptorchestes berolinensis (C.L. Koch, 1846), and Menemerus semilimbatus (Hahn, 1827) are recorded for the first time for Cephalonia island, and Philaeus chrysops (Poda, 1761) for Ithaka island.