Any of several ants of the genus Solenopsis, especially S. geminata or S. saevissima of the southern United States and tropical America, that build large mounds and can inflict a painful sting. a type of insect that lives in groups. They build large piles of earth to live in, and can give a very painful bite. Any of a genus (Solenopsis) of insects in the ant family, several species of which are common in southern North America. They are red or yellowish and can inflict a severe sting. The semipermanent nest consists of a loose mound with open craters for ventilation. The workers (see caste) are notorious for damaging planted grain and attacking poultry