Formica paralugubris (Hymenoptera, Formicidae) in the Italian Alps from new data and old data revisited.

We provide evidence that Formica paralugubris Seifert, 1996, a species of wood and recently described from Switzerland, is present in the Italian Alps. Until 1996, this species was confounded with F.lugubris Zetterstedt, 1838. We examine the wood and collection deposited at the University of Pavia (Italy) and collect new samples within the Italian Alps. Formica paralugubris seems to be more abundant than F.lugubris. Moreover, both species are found in sympatry in some localities