190 
Allen and Brewster on Colorado Birds . 
[October 
the throat is not darker than in some examples of hiemalis , but its posterior 
outline is convex, as it should be with orego?ius, and the ash does not 
extend along the sides of the body, which are only faintly washed with 
pinkish-brown. The upper parts are nearly uniform dingy olive-brown, 
inclining to ashy on the rump, but with no appreciable ashy on the crown 
or nape, where the brown is of even a lighter shade than on the back. 
Mr. Brown has called attention* to similar specimens from Texas, several 
of which, now in my collection, are identical with these Colorado ones. I 
agree with Mr. Brown in considering them intermediates between hiemalis 
and oregonus . 
58. Junco annectens. Pink-sided Snowbird. — Very 
common during March and the early part of April. Last seen 
April 25. 
59. Junco aikeni. White-winged Snowbird. — A single 
specimen was shot April 11, the only one positively identified. 
A specimen (No. 7518, Coll. W. B.) taken by Mr. Aiken in El Paso 
County, Colorado, February 24. 1874, is peculiar in having the entire 
outer webs of the first two primaries, and a broad edging on the outer 
webs of the next three, snowy white to the tips of the feathers. The 
secondaries and tertials also, are broadly tipped with white and the wing- 
bands are exceptionally broad and pure, the general effect of the folded 
wing being white rather than dark. Elsewhere the coloring is normal. 
Among Mr. Aiken’s extensive series of these Snowbirds I found no 
specimens which showed any intergradation between J. aikeni and its 
allies. 
60. Junco caniceps. Gray-headed Snowbird. — More 
or less common till about May 1 . 
61. Spizella socialis arizonae. Arizona Chipping Spar- 
row. — Observed daily in small numbers from April 1 1 till May 
8. At the latter date they became much more numerous, being 
met with in flocks, sometimes of large size, from this time till 
about May 20. They were especially abundant during a period 
of cold, stormy weather, lasting from May 8 to 14 in ravines 
bordered by oak scrub. A flock seen at Austin’s Bluffs, May 
13, must have contained at least a thousand birds, and flocks 
containing hundreds were repeatedly met with. There were with 
them usually a few Brewer’s Sparrows. 
The essential characters of this race, as compared with socialis , seem 
to me to be its longer tail and wings, lighter ashy about the head and 
neck, narrower dorsal streaks and the very much paler, more ochraceous 
ground color of the interscapular area. Weighed by these characters 
the variety is a constant and easily recognizable one. But in the series 
before me (embracing about thirty examples) all the other differences which 
* This Bulletin, Vol. VII, p. 38. 
