O. P. PEARSON Zapus trinotatus Aug 9 - Caught 5 overnight in grassy - march . Only other mammal caught there was Sorex vagrans , 3 were male, dead, and 2 females by tail, alive but cold & numb . They had not become fully active when killed about 6 hours later. More were fat, one of the females had puerperal scars plus original plug and fluid-filled uterus - hence two litters per season ? . Murray says he found a nest and litter of furred young under a board or log. Aug.10 Was surprised to catch Zapus in thick mossy spruce - fern grove. They were in or near sedge in each case. One was a non-puerperal female with thick vagina Aug.11 Dr. Miller found a young lime Zapus on the road not more than a foot from where he first saw and chased a garter snake. The snake was probably carrying it. Aug 12 More fat yet. A smaller one today had 6-mm. testes Aug 13 Caught Zapus in thick big redwood forests along stream. Aug 14 One in thick big redwoods about 100 feet above stream among ferns and bush - no sedge or grass of any sort anywhere around. Saw one in grass-thistle dry meadow while jacklighting at 9 p.m.