W.B. Davis 1936. Snake River Bridge, Ontario, Malheur Co., Ore. May 26. This locality is only 11 miles east of the type locality of Viglis - at Vale. They are abundant here in the drier portions of the fields and along the river bank. I collected 7 adults - all very fat - 6♂ and 1♀, shot several others but saved only the adults. They are highly colonial, and each burrow which has young usually harbors from 5 to 8 plus the adults. One colony which I have watched carefully had several family groups. One family consisted of 2 adults - the 2 collected - and 8 young. 7 of which I trapped in a steel trap set at one entrance to the home burrow. Four of these I have alive in a cage, and in addition another young one taken at another, quite removed burrow. There is evidence to indicate individually that the young are preparing separate burrows for themselves. Small entrance 60 x 80 mm. in one instance, with fresh earth in the mounds are commonly seen. Trapping at such places results in the taking of only one young individual. I tested out the ability of this squirrel to swim. Caught one in a steel trap which broke its front left leg and threw the squirrel out into the river.