the limb. The two white
eggs are laid in May or June; size .50 x .35.

429. BLACK-CHINNED HUMMINGBIRD. _Archilochus alexandri._

Range.--North America west of the Rocky Mountains; north to British
Columbia; winters south of the United States.

Similar in size and appearance to the Ruby-throat, but with the chin and
upper throat black, the rest of the throat gorget being violet or
amethyst. It is an abundant species in summer in many localities,
especially in the southern half of its range. They build their nests at
low elevations, rarely above ten feet, on small branches or the fork at
the end of a limb. The nests are made of yellowish plant fibres and are
not covered with lichens, so that they have a peculiar spongy
appearance. Eggs indistinguishable from those of the Ruby-throat. Laid
during April, May or June.

[Illustration 275: Ruby-throated Hummingbird.]
[Illustration:]
[Illustration: right hand margin.]

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[Illustration 276: RUBY-THROATED HUMMINGBIRD.]

Page 275

430. COSTA'S HUMMINGBIRD. _Calypte costae._

Range.--Southwestern United States; north to southern Utah; winters
south of our border.

Smaller than the last and with both the crown and the throat gorget,
violet or amethyst, the feathers on the sides of the latter being
lengthened. Their nests are situated in the forks of branches generally
near the ground, and seldom above six feet from it. They are made of
plant down with shreds of weeds, bark and lichens worked into the
outside portions, and are often lined with soft feathers. The two eggs
average .48 x .32. Data.--Arroyo Seco, California, June 10, 1900. Nest
in an alder bush. Collector, Charles E. Groesbeck.

431. ANNA'S HUMMINGBIRD. _Calypte anna_.

Range.--Pacific coast of the United States from northern California,
southward, wintering in Mexico and southern California.

This handsome species has both the crown and the broadened and
lengthened throat gorgets, a purplish pink; it is slightly larger than
the Ruby-throat. They are very abundant in their restricted range, and
nest in February and March and again in April or May, raising two broods
a season. Their nests are made of plant down and covered on the outside
with cobwebs and a few lichens, and are generally located at a low
elevation. The white eggs average .50 x .30. Data.--Santa Monica,
California, March 4, 1897. Nest in a bunch of seed pods in a gum tree,
ten feet from the ground. Collector, Tom Bundy.

[Ill