Childs 1957 Microtus oconomus 26 June Pitmezen River, Cape Sabine, Alaska Caught one in T3 - 0.2, Carex-eriochlamn. 4 July Caught one in T8 - 7.2 in 1' high arctophila. There is evidence of a small population in this marsh from fresh cuttings. The situation looks like the area south of both area at Barrow but much less extensive 7 July See journal and Rangifer for comments. 13 July Caught one T8 - 4.2 under E. vaginata tussock. 19 July Camp D. Pitmezen River, mi SE Cape Sabine Alaska One caught under 4' willow (See M. mivorus) 21 July Caught one on hillside under Birch. Hillside gravelly remnant of chapparal in Strawberry Canyon with cluff etc. underneath. Area very marshy and low catch due certainly to the rain 23 July Camp C. Pitmezen River, mi SE Cape Sabine, Alaska Caught 4/4 here along edge of Carex aquatilis and E. oblongus marsh where runways were well developed and hay piles of carex 1-2" long were cut and spread out. Apparently both species of microtus do well in the upland and if there is habitat segregation it is that micros takes the drier areas where it can dig and make extensive runways and this species takes the wetter spots. Cover seems less important to this species.