Pavlova Nadezhda S. RussiaSaratovSaratov State University, 33 Astrakhanskaya Str., Saratov 410012, RussiaNadya1818@yandex.ru Author's articles PECULIARITIES OF FEEDING AND DAILY ACTIVITY OF ANTS OF GENUS FORMICA (INSECTA, HYMENOPTERA) IN FOREST-STEPPE BIOTOPES OF SARATOV REGION