WB Davis Snake River Bridge, Ontario, Molheur Co., Oregon. May 26. as far as I could. It sank, then rose, and swam to shore, same bank, even though the leg was injured. It seemed to be able to swim as rapidly as a small dog. I kept the animal in a cage all night and next morning when I took the lid off to look at it, it jumped out, ran to the edge of a ditch 2 ft wide full of water, entered the water and swam against the current up under a bridge where it escaped. These two instances show at least that these squirrels can swim. However, the river here appears to act as a barrier to them for on the opposite side of the river Citellus idahoensis is found. I measured the width of the river at this point by pacing off the width from shore to shore via the bridge. It was 255 paces of about 30" each. a small island 30 paces wide is 30 paces from this, the west bank. The main current is in the channel between the island and the east shore. Peguyrat reported seeing ground squirrels on the island. This place was doubtless reached during the period of low water.