Hoffmeister 1939 Richrodontomys megelatis July 2 Columbia R, 300 ft., at mouth of Deschutes R., Wasco Co., Ore. This species seems to be relatively common around this region. I have caught it in the damp undergrowth near the river as well as at a distance above the stream, in the dry Artemisia covered hills. July 18 Paterson, 250 ft., Benton Co., Wash. This species occurs commonly together with Mus musculus in the 100 acre pear orchard in which we are encamped. I have caught them in the grass along the irrigation ditches, and in the drier areas. July 20 2½ mi. SW Irigon, 300 ft., Marion Co., Oregon At this locality, nearly opposite Paterson, I caught this species on the dry plains which are covered with Purshia, wild barley, etc. July 24 Touchet R, 850 ft., 1mi. W Leman, Walla Walla Co., Wash. Caught a large series along the eastern bank of this river last night, but all the specimens were eaten somewhat by ants when the traps were taken up.