128 University of California Publications in Zoology [Vow 30

plant fiber, the lining of fine grass. It contained four slightly ineu-
bated eggs. This nest, like the others, was found by flushing the bird.
The last two nests discovered, both taken by Brooks, are now in the
collection of Colonel John E. Thayer, Lancaster, Massachusetts.

The dates on which these nests were taken is probably indicative
of the usual time of egg-laying, but some sets are evidently laid at a
much later date. On August 3, on Spruce Mountain, a pair of birds
was seen, which, from their actions, obviously had a nest nearby, and
on August 5, on the same mountain, a nest was found containing naked
young, probably about a week old.

The Thayer collection contains four sets of eggs of the golden-
crowned sparrow, collected by John Koren, with data as follows:

(1) Anvil Mountains, near Nome, Alaska; June 21, 1910; 5 eggs.

(2) Anvil Mountains, near Nome, Alaska; June 21, 1910; 7 eggs
(8 broken).

(8) Nelson Island, Bering Sea, Alaska; July 3, 1910; 3 eggs.
(4) Shumagin Island, Alaska; July 8, 1911; 5 eggs.

The parent birds of each set are also in the Thayer collection.

On July 8 young out of the nest were first seen on Monarch
Mountain, and here, as in previous experiences, I had impressed upon
me the extreme wariness of the young birds. They were in thickets of
dwarf birch and balsam. When a brood was flushed they scattered to
distant points, and each bird, alighting in a bush, at once scuttled
through and was away to another hiding place. The adults are not
hard to approach; they apparently watch and direct the retreat of
their offspring.

On July 18 young were taken in juvenal plumage throughout and
with full-grown rectrices. Others molting into first winter plumage
were collected July 27 and August 5. One young bird still mostly in
juvenal plumage was taken August 24.

The young of the golden-crowned sparrow is generally similar to
the same stage in the three species of white-crowned sparrows.
Coronata lacks the decided head markings that are seen in the juvenal
white-crowns and it has a suggestion of yellowish upon the forehead.
Compared with the grayish lewcophrys, young coronata is generally
darker colored and the ventral streaks are darker, heavier, and more
extensive. Compared with gambelii, young coronata is generally
browner. Young coronata and young nuttalli are closely similar in