Biology. This is the most common member of this genus in New Mexico. Nests are usually found in the soil with the entrance surrounded by a circle of pebbles with a diameter of about 50 cms. Even nests under stones usually have the entrance surrounded by pebbles. Most nests are found in rocky soil, although they may nest in sandy soils, even dunes. Individual foragers are usually found during early morning and evening, and occasionally during the night. Foraging occurs throughout the day during the cool part of the year or even on cloudy days during the summer. These ants are omnivorous. Prey usually consists of dead or dying insects, parts of plants and seeds. This species is very aggressive, but cannot sting; the bite is very fastidious when large numbers are attacking.
Wheeler, 1910; Wheeler and Creighton, 1934; Cole, 1934; Mallis, 1941; Cole 1953; Creighton, 1955; Whitford and Ettershank, 1975; Rodrguez, 1986; Rojas-Fernndez and Fragoso, 1994, 2000.
(From Mackay and Mackay, 2002).