2 2 A. Scott on the Breeding Habits, of Arizona Birds. [October 



nest. On June 4 I found a pair of these birds just starting to 

 build ; but this was the second brooding, as the female of the 

 pair, which I took before I discovered the nest, clearly showed. 

 And also on this day I found the first fully JJcdg'cd young shift- 

 ing for themselves. June 6 was the date on which I found a 

 second nest containing three eggs, slightly incubated, the female 

 of this nest being catalogued as No. -757- On the same day I 

 also found a completed nest on which the female was sitting, as 

 before described, but which contained no eggs as yet, and it being 

 at rather a remote point I did not visit it again. 



My notes as to time of nesting are concluded on June 11, when 

 I found a pair just beginning a nest, and another pair with a nest 

 about half finished, both nests being situated in mesquites about 

 seven feet from the ground, in smooth, flat country, at an altitude 

 of about 3500 feet. 



From the nests obtained, which are before me as I write, and 

 from notes as to their location, etc.. I append the following 

 details. 



Nest of June 2. Built in a kind of thorn bush, almost at the 

 extremity of one of the upper and overhanging branches, six 

 feet from the ground. It is composed externally of the dry out- 

 side skin or bark of a coarse kind of grass, rather loosely woven. 

 But immediately beneath this loose, external layer is a wall of 

 the same material, very closely and strongly woven. The lining 

 of the nest, which is very distinct from the walls, extends 

 throughout the interior. It is much thicker on the bottom of 

 the structure, but extends up to the rim, where, however, it is 

 thin. It is composed of line dry grasses, arranged on the sides 

 of the nest in concentric layers, much as the horse-hairs are 

 placed in the nest of Spizella domestica. On the bottom this 

 arrangement does not obtain, but the grasses cross one another 

 seemingly at random, forming a soft mat. The walls are uni- 

 formly about one-fourth of an inch in thickness, and the shape 

 of the entire structure is that of a half sphere. The external 

 diameter at the rim is two and three-fourths inches, and the diam- 

 eter at the same point inside is two and one-quarter inches. 

 The depth outside is two inches, and inside one inch and three- 

 quarters. The nest is attached at the rim for almost the en- 

 tire circumference very much like a Red-eyed Vireo's nest, but 

 here the resemblance ceases, for it is not fastened to the many 



