From March to May Mr. Dresser found these birds very abundant in the fields near the San Antonio River, and in some swampy grounds. They seemed to prefer that sort of locality, and the banks of the river, keeping among the flags and rushes. Their stomachs were found to contain small seeds. Mr. Lincecum also met with a few in Washington County of the same State. It was not met with in Arizona by Dr. Coues, but Dr. Kennerly found it in the month of February from the Big Sandy to the Great Colorado River. It confined itself to the thick bushes along the streams, and when seen was generally busily hopping from twig to twig in search of food. When started up, its flight was very rapid and near the earth. Dr. Heermann obtained this species, not unfrequently, both in Northern California and in the Tejon Valley. On all occasions he found it in company with flocks of Sparrows, composed of several species. Lieutenant Couch took this species at Tamaulipas, Mexico, and at Brownsville, Southwestern Texas, in March. It has also been seen in May, at the Forks of the Saskatchewan, by Captain Blakiston. Lincoln’s Finch was met with by Mr. Ridgway in abundance only during its spring and fall migrations. Towards the last of April it was quite common in wet brushy places in the vicinity of Carson City. It was next observed in October among the willows bordering Deep Creek, in Northern Utah. In the weedy pastures in Parley’s Park it was a common species, frequenting the resorts of the _Z. leucophrys_. A nest, with young, was discovered near the camp. It was embedded in the ground, beneath a bush. Its song he did not hear, only a single _chuck_, almost as loud as that of the _Passerella schistacea_. Dr. Cooper reports this species as near San Diego about March 25. Large flocks were then passing northward. During the day they kept among the grass, and were rather shy and silent. They seemed to have a good deal of the habits of the _Passerculus_, and to differ much in their gregariousness, their migratory habits, and their general form, from the other _Melospizæ_. Dr. Cooper did not meet with any of these birds in the Colorado Valley, nor has he seen or heard of any having been found in California during the summer. The _M. lincolni_ has been found breeding up to high Arctic latitudes. It was met with by Mr. Kennicott at Fort Simpson and at Fort Resolution. At the latter place its nests were found between the 2d and the 14th of June. They were also obtained in May, June, and July, at Fort Simpson, by Mr. B. R. Ross, and at Yukon River, Fort Rae, Nulato, and other localities in the extreme northern regions, by Messrs. Reid, Lockhart, Clarke, Kirkby, and Dall. On Mt. Lincoln, Colorado, above eight thousand feet, Mr. Allen found this Sparrow very numerous.