[IMAGE 2 of 2] This very rough-looking (this image has not been over-sharpened) Pogonomyrmex salinus
worker was imaged while gnawing on the femur of a large grasshopper leg, in central Oregon. As can be seen here, a good portion of the lower marginal area has been broken away by the ant's mandibles. The heavier medial area of the leg (with raised chevron-like ridges, and surrounded by the thick 'carinula') was apparently too tough for this determined ant, and she seemed unable to make any more progress. We believe the Pogo was trying to separate this large object into easily transportable pieces (the tibia was still attached, so the grasshopper leg was more than twice the length as can be seen in these images).