256 
all; and, with Dr. Cooper, I am inclined to believe that it is wanting through the 
Coast range. It is spoken of as quite numerous in the Sacramento Valley in summer 
by Dr. Newberry, and not unlikely occurs in the interior and western portions of the 
State at this season. 
104. Antrostomus nultalli, (Aud.).—Poorwill. 
On the summits of the mountains near Fort Tejon the Poorwills were remarkably 
numerous, keeping hidden during the day among the dense chaparral, where they 
crouched so close that I several times almost trod on them ere they took to wing. 
No. 
Sex. 
Locality. 
Date. 
Collector. 
751 
cT jun. 
d jun. 
Tejon Mountains, Cal. 
Aug. 2 
H. TV. Henshaw. 
752 
.do. 
Aug. 2 
Do. 
105. Chcvtura vauxii, Townsend.—Oregon Swift. 
A Swift was present in the Tejon Mountains in August, which I believe was this 
species. 
Trociiilidve.—Humming-birds. 
106. Stellula calliope, (Gould).—Calliope Humming-bird. 
This species was most unaccountably rare in the mountains of Southern California, 
and I saw" but a single individual in the Tejon Mountains, August 17. Even this may 
have been a migrant, and the species may not occur at all in summer in Southern Cali¬ 
fornia. It is very abundant in the Cascade Mountains in the northwest, where it 
breeds. 
107. Trochilus alexandri , Bourcier & Mulsant.—Black-chinned Humming-bird. 
This Hummer was not found by our parties very common in any portion of Califor¬ 
nia. They are probably most numerous in the early part of the season, when dowers 
are most abundant. 
No. 
Sex. 
Locality. 
Date. 
Collector. 
403 
d" pin- 
Tejon Mountains, Cal.. 
Aug. 19 
H. TV. Henshaw. 
108. Selasphorus rufus, (Gmel.).—Rufous-backed Humming-bird. 
This species is quite common in summer throughout California, and breeds appa¬ 
rently as commonly in the valleys as in the mountains. It occurs at this season all 
along the coast as far to the north at least as Sitka. A few probably remain during 
the winter,.in the warm, sheltered valleys of the western part of the State, though the 
species, as a rule, retires farther south for winter-quarters. In comparing a series of 
these birds taken in California and to the northward with a full suite secured by the 
expedition in Arizona aud New Mexico, I was struck w’ith certain differences in colo¬ 
ration which appeared, and though these, after full consideration, appear of too slight 
and inconstant a nature to warrant the definition of a varietal form upon them, they 
are yet of sufficient interest as to be worthy of mention. Briefly, the differences resolve 
themselves into a somewhat deeper tone of coloration in individuals from the Pacific 
coast. The slight cinnamon of the interior type becomes, in some specimens, a deep 
rufous, aud in all it is noticeably darker. In the male, the flame-colored gorget is tinged 
strongly with purplish. In them is seen also a tendency to retain the metallic-green 
color on the dorsal surface, which is common to the females and young, and which, in 
the interior, is always replaced in the adult males with clear light cinnamon. 
In no small proportion of what appear to be adult males from the Pacific coast the 
metallic green extends from the head entirely over the back and even over the upper 
tail-coverts, leaving only the tail rufous. Some males, also adult, are found, which 
have the back of an unmixed rufous, while many occur which exhibit both phases of 
coloration in varying measure—green mixed with rufous, rufous mixed with green. 
As these different conditions may be found in the same locality in California, the 
impossibility of drawing a varietal line is here seen. 
