● Duval Mine Rd, Sahuarita [Pima Co], AZ USA [el. 882 m / 2893 ft] view location in Google Maps » ● 11/06/10 7:18AM sunny, air temp: 14°C / 58°F In this close-up of a Messor pergandei worker, the propodeal spines and the psammophore can be seen. - Pogolumina - Pogonomyrmex Harvester Ants of North America