1908] Grinnell_—Biota of the San Bernardino Mountains. 111 
Helminthophila celata lutescens (Ridgway). 
Lutescent Warbler. 
Lutescent warblers were evidently breeding on the upper 
Santa Ana in the vicinity of Seven Oaks, as a nearly full-fledged 
juvenal was taken there June 13, and several more were noted 
the first of July. Adults and young were seen as far up the 
Santa Ana as the mouth of Lost creek, 6400 feet altitude, where 
an immature specimen was taken July 31, 1906. In the vicinity 
of Bluff lake birds-of-the-year in various stages of moult were 
common in the willow thickets July 17 to 26, 1905. I hardly 
think that these were reared there, they having probably moved 
up from the lower cafons. The species was still common around 
Bluff lake up to September 3, though then in full winter plumage. 
In company with other warblers in roving bands it was common 
on the summit of Sugarloaf, 9800 feet altitude, August 19; and 
several were seen about a spring on the north slope of Sugarloaf 
on August 22. All of the eighteen specimens secured are strictly 
referable to lutescens. 
Dendroica aestiva brewsteri Grinnell. 
California Yellow Warbler. 
This species was common in June along the Santa Ana among 
the willows, alders and cottonwoods as high as Seven Oaks, 5000 
feet altitude. It was also noted on Mill creek and doubtless oe- 
curs in most of the lower canons on the Pacific side of the moun- 
tains. A nest was found near Seven Oaks June 13,1905. It was 
nine feet above the ground in an alder and contained four slightly 
incubated eges. An immature male, already in complete winter 
plumage, was taken at Fish creek, 6500 feet altitude, July 4, 
1905; and later in the season the species was liable to be found 
in migration almost anywhere. At Cushenbury springs, at the 
desert base of the mountains, yellow warblers were common in 
the cottonwoods, August 11 to 14. They had also appeared com- 
monly about the springs at Cactus Flat, August 15 to 17; and 
in the willow thickets at the north base of Sugarloaf, August 20, 
many were noted. The seven specimens secured all belong to 
the race brewsteri, which is easily distinguishable from the bird 
