P. PEARSON 1951-1952 mothafrocta (cont.) from above. Finalized on pgs 2 mothafrocta also about 50 yards away at the same time & Remated (and watched) rest for rest of day and at 5:30 p.m., but no other birds seen nearby. About 10 a.m. a lone bird was feeding & preening about 40 yds. away. Wounded it but it escaped. Then looked for nest and found that indrain had removed eggs as well as our stone marker!! Feb.23 Hunting with Koforide to Arequipa-Puno km 100. Collected one ? and ? (egg in clutch) among features and some ichu (13,800ft.) and heard Trunnos about 100 ft. higher on a facing hill that was rockier. Feb.25 82 km. W. Puno, 14,000ft. Heard the robin-like chirp near bus at 7 a.m. and saw pair of perdis across stream from bus feeding into wet green flat. Watched for hour or more. As before one of the pair was slightly larger, more of crest on head, grayer less brown, and seemed to follow the other one around. Will call this large one the ?. While watching the ? of this pair he started to run and I saw that he was chasing another trunnos. After about 10-15 yards of very rapid pursuit during which our ? was only a foot or two behind the other bird took off with screeder and flew away. Our ? rejoined the ?. Later we noticed that there were 2 ?? present, as well as the ?, all within requiring distances of each other, but no fights. The ? soon wandered uphill 100 yards and sat and preened for 15 minutes or more. The other 2 birds then wandered up the hill for about 200 yards, then also stopped & preened. About 3:30 in afternoon a pair were again on the flats near the bus- mostly walking in the grass, not much