CHILDs 1951 MICROTUS July 10 Uniat, 400ft., Alaska Gil got 3 lastnight and me Tonight. One looks peculiar and is probably a different species. Sitzu got a good series both here and at gubri I believe. He also got than at Pt. Hope as did Schiller earlier. Sitzer calls the strange one reconomus and the Others murinus. Aug 7 East Oumalik, 110mi SSE Barrow, Alaska We were very successful in trapping both species at this locality. It was apparent from our trapping results that murinus was an inhabitant of the willows with a sandy substrate and relatively thick green ground cover while reconomus was found in the wet, swampy areas, along the "front heaves". This was borne out by the last trap line which we ran along the edge of the lake. There was one of these "permafrost ridges" near the wind sock which paralleled the lake edge. The catch was 6 Reconomus, 1 murinus, as 1 Lemmus thus showing some overlap. Murinus was particularly abundant and they could be heard and often seen scurrying about under the willows. Fresh digging and holes were everywhere in the tall willows.