yards from the ranchhouse and later showed it to the rancher. He explained, upon seeing the squirrel, that he had not considered these small animals squirrels, but only sage animals, picket pins or something of the sort. We thus learned not to wholly depend on the word of a farmer, but to investigate for ourselves. The squirrel shot, was smaller than the idahoensis we had seen secured previously, and was a great deal lighter in color. For this reason we felt reasonably sure that we were dealing with Citellus leucodon, and further observations on habits and call notes helped confirm this belief. The burrow openings were in groups in low mounds, often spreading over several square yards of area. The squirrels seemed to be colonial in habits, not only in their sharing of burrow systems, but we also found that they lived in colonies of restricted area. The colony of squirrels here, we found, was confined to an area of not more than 250 yards along the border of an alfalfa field. The alfalfa seemed not to be of any significance for the squirrels were at all times found in the field. The colony ended almost abruptly