"M" B Richardson 1936 Microtus californicus July 4 Parker Meadow, c 400 ft. Tulare Co., Calif. My catch including 1 of this species in the 115 traps. Eggsal area - Sierra Nevada. life zone - Canadian. Habitat - This individual was captured in a non grassy area at the base of a large fir tree. There was no grass within 100 ft of the spot of capture, but there was a good deal of litter and an fallen log in the vicinity.