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1908] Grinnell_—Biota of the San Bernardino Mountains. 71 
Calypte costae (Bourcier). Costa Hummingbird. 
The Costa hummingbird was a common species along the Pa- 
cifie base of the mountains in June, 1905. Along the lower course 
of the Santa Ana as far up as the Narrows, about 2500 feet alti- 
tude, the species was numerous, and three nests were found June 
11. These were all above the road on the canon side, two on twigs 
of bushes and one in a sycamore. The latter contained two fresh 
eggs. 
A number of this species were seen, and a specimen secured, 
August 10 to 13, at Cushenbury springs, at the desert base of 
the mountains. Four examples of this species were obtained in 
the region. 
Calypte anna (Lesson). Anna Hummingbird. 
The Anna hummingbird was common in the Upper Sonoran 
chaparral belt and lower canons in June and July. It was seen, 
and an adult male secured, in the lower Bear ereek canon, June 
12, 1905, and it was noted commonly on the brushy slopes above, 
up to Clark’s ranch, about 5000 feet elevation, both on this date 
and September 4. The species was noted at, and down the Santa 
Ana from, Seven Oaks, in June, 1907. On the twenty-first I 
found a nest, with the female sitting, in an alder near Ball’s 
ranch. 
Later in the summer this hummingbird became spread broad- 
cast throughout almost all altitudes. It was first seen out of its 
breeding zone July 2 (1907), when a full grown juvenal poised 
for a moment in front of a red sweater at our South Fork camp, 
on the upper Santa Ana. It was taken August 14, 1905, at 
Cushenbury springs; at Cactus Flat, August 16; at the north 
base of Sugarloaf, August 21; and at Bluff lake, August 31. Six 
examples were preserved. 
Selasphorus alleni Henshaw. Allen Hummingbird. 
Selasphorus rufus (Gmelin). Rufus Hummingbird. 
Owing to the impossibility of distinguishing at a distance 
adult females and young of Selasphorus alleni and S. rufus, I 
will have to group the field observations on the two species, except 
where specimens were secured. Adult males were extremely 
