20 
Pasadena Academy of Sciences 
Publication I. 
shrike notes. The rustle of the tent door or the click of a gun 
lock, however, was sufficient to send him up over the ridge, not 
to appear again for hours. On April 2, I found .a nest and suc¬ 
ceeded, after lying in ambush for a long time, in securing the 
female bird. The nest was in a small bush growing out from 
the side of a canon, and was composed mostly of sheep wool, 
with an admixture of weed stems and grasses. Five slightly 
incubated eggs constituted the set. They are not different from 
eggs of true L. /. gambeli of the mainland, and measure: 
.97X.72, .96X.72, .95X.71, .95X.73, .96X.72. During our last 
visit, Mr. Horace Gaylord secured another adult female and a 
juvenile, and I took another juvenile, making four specimens in 
all obtained. This Shrike is not exactly referable to L. I gam¬ 
beli, but appears to be nearer that than either of the other U- S. 
forms. 
26. Helminthophila celata sordida —Dusky Warbler. 
At the time of my first visit, the Dusky Warblers were quite 
numerous in the weed-patches and brush along the ravines nearly 
to the beaches. But later when most ot the plants were dry 
and dead, they were confined to the cherry thickets along the 
canons. Their song and habits were similar to those of the 
Lutescent Warbler of the mainland. Seventeen specimens of 
the Dusky Warbler were taken. 
27. Dendi'oica auduboni —Audubon’s Warbler. 
I took a single specimen on March 28; it was at the windmill 
and was evidently a winter visitant. 
28. Mimuspolyglottos— Mockingbird. 
Not uncommon among the cactus patches on the higher mesas, 
but very shy. Two adult males were secured; these agree in 
being dorsally lighter than mainland specimens. No nests were 
discovered, but full-fledged juveniles were seen on June 3. 
29. Salpinctes obsoletus —Rock Wren. 
Tolerably common on the rocky canon sides, but excessively shy. 
On March 30, a male, the only one noted during the first visit, 
was heard singing, and finally secured. Its song was remarka¬ 
bly beautiful, resembling closest that of a Thrasher, yet with 
the sad cadence of a Hermit Thrush. During our second visit, 
an adult female and a juvenile were taken. 
