Koford, R. 1975 Journal White Cloud campground, 4300 ft., 11 mi. E Nevada City (by rd.), Nevada Co., Cal.f. 26 June I spent from 0645 to 1330, 1530 to #2100 in the study area, hearing 18 churring calls, trapping 3 squirrels, one of which I had not previously caught. I also found one nest of a mother and young. In the early afternoon I went into Nevada City for dry ice and supplies. On the way back, about 500 m. E of the National Forest boundary near Five Mile House, The skull was crushed, so I did it prepare a specimen. at about 3700 ft., I found a pregnant ? d.o.r. She had 2 embryos in the right horn - one 23 mm. crl), the other squashed but about the same size and 1 embryo (21mm. crl) in the left horn. In addition, there was a bulge about 6 mm. long in the left horn which I supposed is a resorbing embryo. Both embryos seemed to be male and were preserved. I later collected 25 Sugar Pine catkins, green, which were dropped on twig tips by a squirrel. The sky was clear, wind 0-10 mph, temp. 65° 51°F at 0800, 65° F at 1700, 48°F at 2030. 27 June I spent 0545 to 1300, 1345 to 1830 in the study area, hearing 14 churring calls. I caught 3 squirrels - one twice. I counted the Sugar Pine branch tips I'd collected yesterday - 309. At least half had some catkins still on them. Another 24 were cut today - only a few of which had catkins on them. I separated the cores from the rest of 25 catkins I'd collected so I can analyze the caloric content of the part the squirrels eat. At 1830 I went to a pullout about 200 m. N of Hwy 20 on the Washington Ridge Youth Conservation Camp road at the 25.80 mile marker, in anticipation of collecting squirrels tomorrow morning. Sky clear, wind light, occasionally up to about 15 mph. Temp. 42°F at 0800, 65° at 1430 and 1830.