IQO Allen and Brewster on Colorado Birds. [October 



the throat is not darker than in some examples oi ktemalis, but its posterior 

 outline is convex, as it should be with oregomis-, 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 nonnal. 



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 i . 



61. Spizella socialis arizonee. Arizona Chipping Spar- 

 row. — Observed daily in small numbers from Api'il 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, mvist 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 compai-ed with socialis, seem 

 to me to be its longer tail and wings, lighter ashy about the head and 

 neck, narrower dorsal streaks and the vefy 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. 



