Machean 1969 4. C. melanotus 23 June) behavior in these, yet. also took a pair near Micro-Met: SU 1066 & 1067. 24 June A newly arrived flock of ca. 30 - mostly or entirely 87T - near traplines IX & X. They were beginning to display and chase around. I collected 5 of these - SU 1068-1072. One was molting heavily; FAP thinks the conclusion of the pre-nuptial molt, but if so it is beginning anew after a total cessation and that molt occurs in opposite sequence to the post-nuptial molt. Doesn't seem too likely. 25 June Found 2 complete nests today - collected both of them. In the morning I flushed a ♀ from a nest - and into the middle of a flock of ca. 30 87T. She was immediately chased by at least 10 of them. Didn't see her get back on. Returned to this nest at 4:45 - the eggs were slightly warm, but in 45 minutes we never saw the ♀. Went out at 7:30 - she was incubating and I collected her (SN ) and the 4 eggs (12.2, 12.1, 12.0, 11.1 grams). In the afternoon Dave Havers and I flushed a ♀ from a nest on Southern end of FAP's plot - ca. 10 m. NW of stakes to 8 of trapline IV. Again - flushed her into the clutches of a flock of males, and she was