559a. Spizella monticola ochracea Brewster — Western Tree Sparrow. 

 Whole state in winter; abundant westward where it is apparently 

 the only form, eastward less common, giving place to and intergrad- 

 ing with the preceding form. Dates as for monticola. Sioux and 

 Cherry counties, Neligh, Lincoln, Omaha, etc. 



560. *Spizella socialis (Wilson) — Chipping Sparrow. 



Eastern Nebraska; arriving the middle of April, breeding in June, 

 departing in late September. Peru, Omaha, Dakota City, West Point, 

 Neligh, Lincoln — common as a migrant and generally as a summer resi- 

 dent and breeder also. Betweenthe98thtobeyondthel03d meridians 

 (which ismuch over half the length of the state), there are few records 

 for this bird until in Sioux county where it is abundant. This, to- 

 gether with the fact that the western form (560a. S. s. arizonae Coues) 

 is the common One in Colorado and Wyoming even within a compara- 

 tively few miles of the Nebraska line (Cheyenne, Wyoming), makes 

 it quite probable that the birds from that region . are the western 

 subspecies. Unfortunately, there are at present no specimens 

 to decide the question. 



561. *Spizella pallida (Swainson) — Clay-colored Sparrow. 



An abundant migrant over entire state, and, according to Aughey, 

 an occasional breeder in the northern part. Arrives first week in 

 May and lingers through that month, appearing again in early Sep- 

 tember and remaining through October. 



562. *Spizella breweri Cassin — Brewer Sparrow. 



Sioux county; a common summer resident and breeder locally. 

 M. A. Carriker, Jr., found it breeding commonly along the north side 

 of Indian creek in the summer of 1901. (See Proc. N. O. U. Ill, 

 pp. 70 and 85.) J. M. Bates reports taking one specimen in Cherry 

 county, May 16, 1891, which was sent to Washington for identifica- 

 tion. 



563. *Spizella pusilla (Wilson) — Field Sparrow, and 



563a. *Spizella pusilla arenacea Chadbourne — Western Field Sparrow. 



The exact status of these two races in Nebraska is still somewhat 

 uncertain, but during migrations arenacea occurs over almost the en- 

 tire state. It breeds abundantly along its northern border (Valen- 

 tine, Long Pine, Springview, Cams, Niobrara City) and less commonly 

 southward (Broken Bow), being present as a migrant only at Neligh, 

 West Point, and Lincoln. Arrives in late March and early April, 

 breeds from middle May through July, departs in late September 

 and early October. The birds breeding at Omaha, Peru, Rulo, Weep- 

 ing Water.and other points in extreme eastern Nebraska, are certainly 

 nearer pusilla than arenacea. There are not sufficient specimens 

 at hand to definitely state the exact ranges of each form. 



566. *Junco aikeni Ridgway — White-winged Jtjnco. 



A rather common summer resident in Warbonnet canyon, Sioux 



