O. Memmler 1941 2. Zapus orarius May 21, Russian Gulch State Park, Mendocino Co., Calif. elev. 70 ft. One ♂ Zapus was caught in a Riparian marginal habitat as on May 18. There were six other animals caught representing 3 other species. There were 24 traps set. May 26, elev. 200 ft. One ♀ Zapus was caught in a Thimble berry clump at the edge of a meadow. There were 5 traps set in similar spots but none other caught a Zapus. May 30, One ♂ Zapus was caught in a meadow in the gulch between the road and the stream. The trap was set in what appeared to be a Microtus runway. There were 23 traps set in this habitat. Two ♂ Neotriches were also caught. 5 traps had feces on them and the bait eaten off.