drier conditions than C. idahoensis, which is usually in Artemisia tridentata. A. oregonus, which is usually along streamside & irrigated fields. Citellus oregonus - They were very abundant at Reynolds Cr. & tho yng. could be seen romping with each other at times. I had "drown one out" of its hole which was within 2 inches of the water level of an irrigation clitch. Water ran for about 5 minutes before the squirrel put his head out & escaped thro the gas. It was completely soaked. Many were found pownd at their burrows. Thomomys quadratus - Two 4's were trapped & one was found dead stopping up orifice of its burrow in a sitting- up position with some poisoned grain in its paws & more grain scattered around. Thinking he was alive I approached carefully. Mr. Adams who owns the farm said he disseminated poison a couple of days ago. To be in feeding as the gopher victim was proved the fast-acting power of the strychnine. The skull was aded. This ops. was much smaller than T. townsendii & brown instead of slate.