1S83.] Allen atid 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 5. 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 11. 



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. 



6"]. 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 Blufls. 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 amoena. 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 



