Riga Elena Yurievna RussiaSaratovSaratov State University , 83, Astrakhanskaya str., Saratov, 410012, Russia Student of the biological facultyanikinvasiliiv@mail.ru Author's articles Biology Features of Ants (Hymenoptera, Formicidae) in the National Park «Khvalynsky» (Saratov Region) New Data on the Fauna of Myrmecophilous Beetles (Coleoptera) in the Nests of Ants Formica rufa Linnaeus, 1761 (Hymenoptera) for Territory of Saratov Province Acoustic Communication Signals between Ants of the Genus Formica (Hymenoptera: Formicidae) and Myrmecophilous Beetles of the Genus Scydmaenus (Coleoptera: Staphylinidae)