110 University of California Publications in Zoology. \Vou.5 
to 22. But the species seemed to shun the dryer regions, even 
after the late-summer migratory movements had set in. It was 
found along Foresee creek, up to 6000 feet altitude, at the north 
base of San Bernardino peak, on July 12. Thirty-one specimens 
of this vireo were obtained. 
Vireo huttoni huttoni Cassin. Hutton Vireo. 
Upon only one occasion did I detect the presence of the Hut- 
ton vireo anywhere in the region. This was across the river from 
Schneider’s ranch, down the Santa Ana from Seven Oaks about 
two miles. My attention was attracted by the characteristic 
note of this vireo—‘zee’--y, zee’-vy’’—and without any difficulty 
I obtained a good view of the bird, to my mind confirming the 
record. I was on horseback at the time, and without means of 
collecting the bird. The loeality is about on the boundary be- 
tween the Upper Sonoran-and Transition zones. The species 
in southern California belongs strictly to the Upper Sonoran, 
on the Pacific side of the mountains. 
Vireo belli pusillus.(Coues). California Least Vireo. 
This Lower Sonoran species was found only at the mouth of 
the Santa Ana, where an adult male was taken in a patch of 
poison oak and water-mootiec, and others heard. These were well 
within the canon mouth. 
Helminthophila rubricapilla gutturalis (Ridgway). 
Calaveras Warbler. 
I feel satisfied that this warbler does not oceur as a breeding 
bird in the San Bernardino mountains, as we kept a special look- 
out for it on the higher cienagas in June and July, without sue- 
cess. The species made its appearance the last of August as a 
migrant. The first were seen and taken at Cactus Flat, 6000 
feet, August 17, 1905. They were common among the tamarack 
pines on the summit of Sugarloaf, 9800 feet, August 19. At 
Bluff lake, August 30 to September 3, the species was fairly 
common in the willow thickets. Five specimens were secured, 
four birds-of-the-year, in full first winter plumage, and one adult 
male, the latter being one of those seeured at Cactus Flat, 
August 17. 
