1883.] Allen and Brewster on Colorado Birds. 191 
have been claimed prove inconstant. Thus in the majority of specimens 
the bill is not appreciably narrower, nor the “rufous of the crown lighter 
and less purplish,” while the alleged fine black streaks on the occiput 
are quite as often absent as in S'. socialis. The character of the wing- 
bands also is similarly variable. 
62. Spizella pallida. Clay-colored Sparrow. — Ap- 
parently not common. One was taken May 4 and another May 
9. A few were seen May 1 1 . 
63. Spizella breweri. Brewer’s Sparrow. — Common as 
early as May 10, when several were taken. They associated with 
S. socialis arizonce , but formed only an inconsiderable portion 
of the large flocks above-mentioned. Later they were found in 
oak scrub. 
64. Zonotrichia leucophrys. White-crowned Spar- 
row. — First seen April 24, and were more or less common for 
several weeks, associating in small parties with Z. gambeli inter- 
media. 
65. Zonotrichia gambeli intermedia. Ridgway’s Spar- 
row. — Probably arrived with the last about April 24, as spec- 
imens ,of each were killed at the same shot April 28. Small 
parties were met with till the middle of May, at first in dry 
ravines and oak scrub, but later they resorted to the willow 
thickets of the creek bottoms. They were much more numer- 
ous than Z. leucophrys. 
66. Chondestes grammicus strigatus. Lark Finch. — 
Became common May 8, when they were first seen. 
67. Calamospiza bicolor. Lark Bunting. — First seen 
May 13 — a flock of about two hundred, all males, flying in a 
compact body through a ravine in Austin’s Bluffs. They im- 
mediately became common on the plains near town. 
68. Zamelodia melanocephala. Black-headed Gros- 
beak. — Appeared May 12, and immediately became common. 
69. Passerina amcena. Lazuli Finch. — Two males 
were seen May 8. Became common May 12. 
70. Pipilo maculatus megalonyx. Spurred Towhee. — 
First seen about April 7 ; gradually became common. 
My series of sixteen specimens is a puzzling one. Among the males 
the majority have the white of the outer webs of the external rectrices 
confluent with the terminal spaces on the inner webs (a character of 
arcticus ) ; while in all, the bases of the primaries are white on their outer 
webs and in two specimens this white extends uninterruptedly along the 
web to the tip of the feather, thus fulfilling one of the most essential 
