s brunneicapillus bryanti._

Range.--Northern Lower California and coast of southern California.

The nesting habits of this variety differ in no respect from those of
the last.

713b. SAN LUCAS CACTUS WREN. _Heleodytes brunneicapillus affinis._

Range.--Southern Lower California.

Eggs indistinguishable from those of the last.

715. ROCK WREN. _Salpinctes obsoletus obsoletus._

Range.--United States, west of the plains, breeding north to British
Columbia, and south to Mexico; winters in southwestern United States and
southward.

This species appears to be quite abundant on rocky hillsides throughout
its range; like most of the Wrens they draw attention to themselves by
their loud and varied song. They nest in crevices or beneath overhanging
rocks, making the nest out of any trash that may be handy, such as
weeds, grass, wool, bark, rootlets, etc.; their eggs range from four to
eight in number and are pure white, finely specked with reddish brown.
Size .72 x .50.

716. GUADALUPE ROCK WREN. _Salpinctes guadeloupensis._

Range.--Guadalupe Island, Lower California.

A similar but darker and browner species than the Rock Wren. It breeds
in abundance throughout the island from which it takes its name, placing
its nests in crevices among the boulders or cavities of fallen tree
trunks and, as is often done by the last species, lining the pathway to
the nest with small pebbles. The eggs, which are laid from January to
April, resemble, in all respects, those of the common Rock Wren.

717. WHITE-THROATED WREN. _Catherpes mexicanus albifrons._

Range.--Northeastern Mexico and the Lower Rio Grande Valley in Texas.

The habits of the White-throated Wren are the same as those of the Canon
Wren, which variety is more common and better known; the eggs of this
species are not distinguishable from those of the next.

[Illustration 426: Rock Wren.]
[Illustration: white.]
[Illustration: deco.]
[Illustration: left hand margin.]

Page 425

717a. CANON WREN. _Catherpes mexicanus conspersus._

Range.--Rocky Mountain region and west to the Sierra Nevadas; north to
Wyoming and Idaho and south to New Mexico and Arizona.

The Canon Wrens are uniform rusty brown all over except the large
sharply defined white throat patch; the underparts, wings and tail are
barred with black, and the back is specked with white. Their name is
well chosen for they are found abundantly in rocky canyons, ravines, and
side hills. They ne