Family XXIV. TROCHILINAE. HUMMING-BIRDS.
GENUS I. Linn. TROCHILUS HUMMING-BIRD

Bill long, subulate, depressed at the base, cylindrical, straight, or slightly arched, flexible; upper mandible with the ridge narrow at the base, convex in the rest of its extent, the sides sloping, the edges soft; lower mandible with the angle extremely acute and elongated, the sides erect, the tip acute. Nostrils linear, with a membranous flap above. Head small; neck short; body moderately stout. Feet very short; middle toe scarcely longer than the rest. Plumage rather blended and glossy above. Wings very long, extremely narrow; tail rather long, broad, nearly even. The other characters as above.