1920.] Cape San Antonio, Buenos Aijres. 11 



carices to the heiglit of twelve to eighteen inches above the 

 water. Eggs completely covered over and hidden by small 

 fragments of said carices, with down and feathers of the 

 parent-birdsj ai-ranged with one in the centre snrrounded by 

 the other five. Both birds in vicinity swimming uneasily 

 about, but not giving vent to the usual alarm note/' 

 "21 November, 1913. Clutch of seven. Nest at edge of 

 open water in centre of deep juncal. Built of dry junco 

 stems with some lining of down. Eight inches high, thirty 

 across at base, and sixteen at top; quite a slight structure 

 on the whole. Parent birds seen near ; silent.'^ 



The next type is that described in my former paper ('The 

 Ibis/ 1880, p. 37) as placed on marshy laiul in the vicinity 

 of lagunas or swamps. To which may be added analogous 

 sites hereafter detailed. Since the year 1880 my personal 

 records of these are seven : from which I quote the follow- 

 ing examples: — "29 June, 1889. Clutch of seven. Nest 

 situated on a low muddy island at tlie Laguna Milan, where 

 it was invisible from the mainland on account of a fringe of 

 tall juncos. Composed of a large solid heap of dry grasses; 

 with a hollow on the top, partially lined with white down. 

 Birds seen. A second similar nest, also with seven eggs, 

 and situated about a hundred yards away, had the owners 

 in attendance. A third (unfinished) nest lay between 

 these two." "15 October, 1913. Clutch oi eight. Nest 

 situated on dry ground amidst a dense covert of juncillo 

 negro, in a most lonely locality close up against the Canada 

 Cisneros. Built of dry junco stems, gathered from the 

 swamp ; lined with fine dry grasses. Note, this nest was 

 not taken l)y myself, but by a trustworthy informant." The 

 iiext narrative is dated 3 November, as follows : — " Locality, 

 a grassy island, some two hundred by one hundred yards, 

 situated in great expanse of comparatively shallow open 

 water (the result of the flood), and surrounded by great 

 cafiadas. The adjoining shoals and mud-flats were alive 

 with myriads of Waders of many species. Coots, and Water- 

 hens, as we passed along with the raft and canoes to shear a 

 flock in 5'«Ym — the great flood being at its acme. The leading 



