The species composition and distribution of ants were investigated on Changling Studhorse Farm in Jilin,located in the south of Songnen Plain where ants were the dominant species among fauna in the soil large-size. The sampling areas were classified into seven categories: grazing-land, old-field, farmland, Populus spp. plantation, country pathway, yard and mowing-grassland. Fourteen of ant species found in these habitats, belonging to 9 genera and 3 subfamilies, were Tetramorium caespitum (L.), Messor ...