Cade 1956 Microtus miurus 17 June Unicat, Alaska On 15 June noted some stacks of dry (last year's) willow leaves at the bases of 2 ft willows on a heath-shrub area immediately west of ARL hut. The ground in this area has very conspicuous and numerous mouse cop. Set 12 traps by 4 of these leaf stacks. Tochto honeysettled 4 animals - all M. miurus. The rod underneath these stacks is packed with mouse droppings. Occasional droppings are found everywhere along the runways, but there are definite, conspicuous spots along the runways where pellets accumulate in an area of 4-6 sq. inches. There may be several hundred pellets in reach a pile - I have not counted any yet. 21 July It is conspicuous after completing trapping on T9 (the above area) and T10 that this mouse is closely associated with stands of lupine, which it apparently eats, as I have found cut leaves in the mouths of trapped animals. Again and again the good trapping stations, where several animals are caught at one stake, or these lines are in patches of almost even lupine. Lupines are very abundant and lush here this year. Do not remember it in so conspicuous in 1952. Shantz also remarked about its growth here.