These birds are never gregarious, though the males come in considerable flocks in the spring, several days before the females. They travel at night, arriving at Santa Cruz about April 12. A nest found by Dr. Cooper, May 7, in a low bush close to a public road, was about three feet from the ground. It was very strongly built, supported by a triple fork of the branch, and was composed of blades of grass firmly interwoven, and lined with horsehair and cobwebs. It measured three inches in height and three and three fourths in width. The cavity was two inches deep and one and three fourths wide. In Arizona Dr. Coues found this bird a summer resident, but not abundant. At Puget Sound this bird arrives about May 15. Dr. Suckley states that in Oregon it was observed returning from the south, in large flocks, in one instance of several hundred individuals. The eggs of the Lazuli, when fresh, are of a light blue, which on the least exposure soon fades into a bluish-white. They are almost exactly oval in shape, and measure .75 by .60 of an inch. One end is somewhat more rounded, but the difference is slight. Cyanospiza versicolor, BAIRD. VARIED BUNTING. _Spiza versicolor_, BON. Pr. Zoöl. Soc. 1837, 120.—IB. Conspectus Av. 1850, 475.—CAB. Mus. Hein. 1851, 148. _Carduelis luxuosus_, LESSON, Rev. Zoöl. 1839, 41. _Cyanospiza versicolor_, BAIRD, Birds N. Am. 1858, 503, pl. lvi, f. 2.—COOPER, Orn. Cal. 1, 234. SP. CHAR. Posterior half of hood, with throat, dark brownish-red; interscapular region similar, but darker. Forepart of hood, lesser wing-coverts, back of the neck, and rump, purplish-blue; the latter purest blue; the belly reddish-purple, in places tinged with blue, more obscure posteriorly. Feathers of wing and tail dark-brown, edged with dull bluish. Loral region and narrow frontal band black. Feathers on side of rump white at base. Length, 5.50; wing, 2.75; tail, 2.38. _Female._ Yellowish-brown; paler beneath, and lightest behind. No white on wing. Tail with a bluish gloss. HAB. Northern Mexico, and Cape St. Lucas. Xalapa (SCL. 1859, 365); Oaxaca (SCL. 1859, 379); Orizaba (SCL. 1857, 214); (SUM. M. B. S. I, 551; breeding); Guatemala (SCL. Ibis, I, 17). The bill is stouter and more swollen to the end, and the mandible is much more curved than that of _C. cyanea_; and its perfectly concave commissure, without any shallow lobe in the middle, and the much more arched ridge, would almost separate the two generically. The wing is shorter and more rounded, the fourth quill longest, then the third, second, and fifth. The first is only a little longer than the seventh. The tail is decidedly rounded; rather more so than in _C. cyanea_.