New Records ofSteatoda nobilis(Thorell, 1875) (Araneae, Theridiidae), an Introduced Species on the Italian Mainland and in Sardinia

Summary In this work we present new records of Steatoda nobilis (Thorell, 1875), a species originally from Madeira and the Canary Islands, for the Italian mainland and Sardinia. We discuss local ecology and ethology and provide brief genital and morphological descriptions of both sexes.