J. Roagna - 1942 28 Enmerus obitronianus July 19 (cont) Mrs. Vert. Zool, Univ. Calif., Berkeley, Alameda C, Calif. The dirt is that they rest directly on the wooden floor. The eggs are scattered about like ooo. July 20 To-day I measured the eggs of nest no. 1 for the first time. They are 12 days old to-day and are darker than they were a week ago. They measured 11.8 x 7.4 mm, 12.2 x 7.5 mm, 12.3 x 7.9 mm, 12.7 x 7.9mm, 13.0 x 7.5 mm, 13.3 x 6.8 mm; average 12.55 x 7.33. The 1 day old eggs of nest no 3 averaged 13.0 x 7.86. The eggs of nest no. 1 either started smaller or have shrunk. Yesterday (July 19) Walt Dalquest and I went to the southern part of San Pablo Ridge (2 mi. SE Bald Peak). When we arrived (about 9:15 am there was a dense fog, as dense as described for the same place July 5, but not so cold. We parked on the old tunnel road about 700 yards south of the east end of the tunnel and hiked in an easterly direction to the top of the ridge, hitting it at the point, i.e. farthest south, of our walk down the ridge on July 5. On the way up we turned over many rocks and usually found the ground very dry & widely cracked underneath. In several places we dug down a foot or so but found only more dry ground. About three fourths of the way up the hill, we dug out under a small rock outcrop, finally moving four or five rocks that averaged 14"