for their open mud nests. The white,
spotted eggs are laid in the latter half of May.

TREE SWALLOW

_Iridoprocne bicolor. Case 5, Fig. 24_

Silky white below and shining bluish green above;
young birds are mouse-colored above but below are
snowy white, unmarked, as in the adult. L. 6.

_Range._ Nests chiefly from southern New England
northward and winters from South Carolina to
Central America.

Washington, common T.V., Mch. 26-May 26; July
8-Oct. 14. Ossining, common T.V., Apl. 4-May 26;
Aug. 4-Oct. 16. Cambridge, S.R., formerly common,
now common only as a migrant, Apl. 5-Oct. 8. N.
Ohio, common S.R., Apl. 10-Sept. 20. Glen Ellyn,
not common T.V., rare S.R., Apl. 21-Sept. 8. SE.
Minn., common S.R., Mch. 30-Aug. 31.

We see comparatively few Tree Swallows during the spring, but from July
to October, as they journey slowly southward, they are the most abundant
members of their family. In countless thousands long ropes of Swallows
crowd the wayside wires from pole to pole. At night, with others of
their tribe, they roost in the marshes.

Tree Swallows they are called because they nest in hollow trees and,
like some other hole-nesting birds, they may be induced to occupy
nesting-boxes, making a welcome addition to our list of bird tenants.
The 4-7 white eggs are laid in May.

BANK SWALLOW

_Riparia riparia. Case 6. Fig. 54_

Note the small size, dull plumage, and
breast-band. L. 5-1/4.

_Range._ A native of the Old World as well as of
the New. In North America nesting from Louisiana
and Virginia nearly to the Arctic Circle; winters
in the tropics.

Washington, common S.R., more common T.V., Apl.
13-Sept. 19. Ossining, common S.R., Apl. 18-Oct.
1. Cambridge, formerly common S.R., Apl. 28-Sept.
1; common T.V. N. Ohio, common S.R., Apl. 6-Sept.
20. Glen Ellyn, fairly common T.V.; a few S.R.,
Apl. 22-Sept. 3. SE. Minn., common S.R., Apl.
10-Sept. 25.

The Bank Swallow is a bird of the air who tunnels the earth for a
nesting-place. Where river or road has left a bank, its face may be
dotted with the entrances to the Bank Swallow's dwellings. At the end of
two or three feet the nest of grass and feathers is placed, fit
receptacle for the pearl-wh