Range. - United States in the Rocky Mountains and west to the Pacific coast, breeding from Mexico to British Columbia; winters south of our borders.

This very beautiful species is smaller than the last, but, like it, is white below, but the upper parts are blue, green and purple without gloss. They are common in their range and nest, usually in holes in trees, less often in banks and under eaves; the nests are made of grass and feathers, and the eggs are pure white, four or five in number; size .72 x .50.

White.

White.

615-616

615a. San Lucas Swallow. Tackycineta Thalassina Brackyptera

Range. - Southern Lower California. Practically the same bird as the last but with the wing very slightly shorter. Nesting habits or eggs will not differ.

615.1. Bahaman Swallow. Callichelidon Cyaneoviridis

Range. - Bahamas; casual at Dry Tortugas, Florida.

This very beautiful species is similar to the western Violet-green Swallow, as are also its eggs.