. Nests and eggs of North American birds. Birds; Birds. 506 NEST8 AND EOGS OP 7676. SAN PEDRO BLUEBIRD. Sialia mexieana anabelm Anthony. Geog. Dist.—San Pedro Martir Mountains, Lower California. I have no positive information regarding the nidiflcation or habits of this sub- species, but they probably do not differ materially from those of the next species. 768. MOUNTAIN BLUEBIRD. Sialia arctica (Swains.) Geog. Dist.—Rocky Mountain region, north to Great Slave Lake, south to Mexico, west to the higher mountain ranges along the Pacific. Known as the Rocky Mountain and Arctic Bluebird. It is ver
. Nests and eggs of North American birds. Birds; Birds. 506 NEST8 AND EOGS OP 7676. SAN PEDRO BLUEBIRD. Sialia mexieana anabelm Anthony. Geog. Dist.—San Pedro Martir Mountains, Lower California. I have no positive information regarding the nidiflcation or habits of this sub- species, but they probably do not differ materially from those of the next species. 768. MOUNTAIN BLUEBIRD. Sialia arctica (Swains.) Geog. Dist.—Rocky Mountain region, north to Great Slave Lake, south to Mexico, west to the higher mountain ranges along the Pacific. Known as the Rocky Mountain and Arctic Bluebird. It is very common in the Rocky Mountain region and is also abundant as far west as the mountain ranges along the Pacific. Breeds in deserted Woodpecker holes, natural cavities of trees, etc. In settled portions of the West it nests in the cornice of buildings, under the eaves of porches, in the nooks and corners of barns and out-houses, and in boxes pro- vided for its accommodation. Mr. Walter E. Bryant says that three incubated eggs, of this species were taken from the nest of a Barn Swallow, at Lake Tahoe, Cali- fornia, by Walter Bliss. Prof. Ridgway found the Rocky Mountain Bluebird breed- ing in Virginia City, Nevada, in June. Its nests were built about old buildings and occasionally in the unused excavations about mines. Mr. Wilbur F. Lamb informs me that in Summit county, Colorado, he found this species nesting generally in old Woodpeckers' excavations. One nest was found placed under the projecting roof- pales of a miner's cabin. The nests were composed almost entirely of dry grass. In some sections, however, the Inner bark- of the cedar enters largely into their composition. In most cases Mr. Lamb found the nests to contain five eggs, though seven perfectly fresh eggs were taken from one nest, while another contained only- three in an advanced stage of Incubation. So that taking the reports of other col- lectors Into consideration with Mr. Lamb's experience, the bird lays fr
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