Solenopsis xyloni, commonly known as the southern fire ant, is a species of ant belonging to the Solenopsis genus. These insects are reddish-brown in color and measure about 2-6 mm in length. They are known for their aggressive behavior and painful sting, which can cause allergic reactions in some individuals. Solenopsis xyloni is commonly found in the southern United States and is known to build large colonies with multiple queens.