1908] Grinnell—Biota of the San Bernardino Mountains. 107 
erasses and a few feathers in a cavity of a rotten pine stub, eight 
feet above the ground. There were three half-grown young and 
one infertile egg. 
Many adults and full-grown young were found congregated 
about the shore of Bear lake July 30 to August 2, 1905. On the 
bare branches of one dead pine on the north shore of the lake, 
July 31, hundreds (without exaggeration) of violet-green swal- 
lows were perching, mostly young-of-the-year. Individuals were 
constantly coming and going, and occasionally nearly the entire 
flock would launch out with loud twitterings, only to gather again 
within a few minutes. It made me dizzy to watch the restless 
throng. A similar gathering, though on a smaller seale, was wit- 
nessed near the South Fork of the Santa Ana, July 24, 1906. 
This species was common about the cienaga at the north base 
of Sugarloaf, August 19 to 23, 1905; and they were still num- 
erous in the vicinity of Bluff lake up to August 31st. Five 
examples were taken. 
Riparia riparia (Linneus). Bank Swallow. 
The bank swallow was observed only at Cushenbury springs, 
4000 feet, where it was seen migrating on August 13, 1905. An 
immature male was taken. 
Stelgidopteryx serripennis (Audubon). 
Rough-winged Swallow. 
Four swallows of this species were seen in flight over the wash 
at the mouth of the Santa Ana, near Mentone, June 11, 1905. 
It seems probable that they were nesting in the vicinity. The 
species was again noted at Cushenbury springs, August 13, when 
an immature female was taken, and several more were seen flying 
over the meadow, evidently in migration. Two were also seen 
flying southeast over Cactus Flat, August 16. 
Phainopepla nitens (Swainson). Phainopepla. 
August 16, 1905, I saw a straggling flock of about twenty-five 
phainopeplas flying southeast high overhead. This was at Cactus 
Flat, 6000 feet elevation, on the desert slope of the mountains. 
The course of the flight suggested that the birds were on their 
