journ in the Middle and Northern States, but collect at night and resort to the sedges and tall plants of the marshes.
Hirundo bicolor, Ch. Bonaparte, Synops. of Birds of the United States, p. 65.
Green-blue or White-bellied Swallow, Hirundo viridis, Wils. Amer. Ornith. voL iii. p. 44. Pl. 38. fig. 3.
Adult Male. Plate XCVIII. Fig. 1.
Bill short, feeble, much depressed and very broad at the base, compressed at the tip; upper mandible slightly arched in its dorsal outline; gap as wide as the head, and extending to beneath the eye. Nostrils basal, lateral, roundish. Head large, flattened above. Neck short. Body rather slender. Feet very short and feeble; tarsus and toes scutellate anteriorly; lateral toes nearly equal, the outer united to the second joint; claws short, weak, arched.
Plumage silky, shining, and blended. Wings very long, acute, the first quill longest. Tail of ordinary length, deeply emarginate, of twelve rounded feathers.
The general colour of the upper parts is steel-blue with green reflections. Quills and tail-feathers brownish-black. The under parts are white.
Length 5¼ inches, extent of wings 10; bill along the back ⅓, along the gap ⅝; tarsus ⅜, middle toe ⅝.
Adult Female. Plate XCVIII. Fig. 2.
The female resembles the male in size and colour.
