Dr. Cooper found a nest, presumed to belong to this bird, at Santa Cruz, in June. It was built in a dense blackberry-bush, about three feet from the ground, constructed with a thick periphery and base of dry grasses and thin strips of bark, and lined with finer grasses. The eggs were of a smoky white, densely speckled with a dull brown. Although this bird was abundant around Santa Cruz, he was only able, after much searching, to find two of their nests. One was in a willow, close against the tree, and three feet from the ground, containing, on the 11th of May, four eggs partially hatched. This was built of coarse dry stems and leaves, lined with finer grasses and horse-hair. It was five inches in external diameter, and four high. The cavity was two and a half inches deep and two in diameter. These eggs had a ground of greenish-white, and were blotched and spotted with a purplish-brown, chiefly at the larger end. They were .82 by .62 of an inch in measurement. The ground-color was paler and the spots were darker than in eggs of _Z. gambeli_, the whole coloring much darker than in those of _M. fallax_. This nest was apparently an old one used for a second brood. Another nest found as late as July 10, and doubtless a second brood, was in a thicket, six feet from the ground, and also contained four eggs. Dr. Cooper states that he has seen the newly fledged young by the 7th of May. Dr. Heermann, in his account of this bird, which he supposed to be the _guttata_ of Dr. Gambel, states that he found it abundant throughout the whole country over which he passed, and more especially so in the bushes bordering the streams, ponds, and marshes. Its notes, sweet, and few in number, resembled those of the common Song Sparrow. Its nests, usually built in thick tufts of bushes, were composed externally of grasses and lined with hair, and contained each four eggs, with a pale bluish-ash ground, thickly covered with dashes of burnt umber. Eggs of this species, from near Monterey, collected by Dr. Canfield, vary in measurement from .85 by .65 of an inch to .88 by .70,—larger than any eggs of _Melospiza melodia_ that I have seen. Their ground-color is a light green. The blotches are large, distinct, and more or less confluent, and of a blended reddish and purplish brown. They are in some diffused over the entire egg, in others disposed around the larger end. Melospiza melodia, var. samuelis, BAIRD. SAMUELS’S SONG SPARROW. _Ammodromus samuelis_, BAIRD, Pr. Boston Soc. N. H. VI, June, 1858, 381.—IB. Birds N. Am. 1858, 455, pl. lxxi, f. 1.—COOPER, Orn. Cal. I, 191. _Melospiza gouldi_, BAIRD, Birds N. Am. 1858, 479.