Pheidole is a genus of ants that belongs to the family Formicidae. These ants are known for their small to medium size, typically measuring between 2 to 5 millimeters in length. They are characterized by their distinct two-segmented waist, with a larger thorax and a smaller abdomen. Pheidole ants are found worldwide and are known for their diverse behaviors and social structures, with some species exhibiting complex caste systems.