● Old Spanish Trail Rd, near Tucson [Pima Co], AZ USA [el. 1049 m / 3442 ft] view location in Google Maps » ● 11/04/2010 4:01PM sunny, air temp: 26°C / 79°F [IMAGE 2 of 2] A beautiful Pheidole xerophila major worker near Tucson, AZ USA. The disproportionately large heads of the majors house the muscles that drive their powerful mandibles - useful for defensive duties, and for milling seeds. - Pogolumina - Pogonomyrmex Harvester Ants of North America