124 PACIFIC COAST AVIFAUNA No. 14 



Otlier spring dates are fi'om Choteau, May 12, 1912 (Saundei-s. 1!)1-1:M, p. 188), 

 and KStacey, May 19, 1917 (Kittredge, MS). The only f;ill diitc is from (Jr<";it 

 Falls, September 9, 1891 (Cooke, 1909c, p. 260). 



While this bird occurs in summer throughout its range in the state, iind 

 undoubtedly l)r(HHls, the linding of the nest has not been recorded. 



286. Spizella breweri Cassin 



Brewer Sparrow 



A common summer resident of eastern ^lontana, occurring westward lo 

 Teton and Gallatin counties. There are not many records of occurrence, but in 

 most places where it has been found it is fairly conmion. It l)reeds in sage 

 brush, and is somewhat more western in its range than »S'. pallida. 



Records: Common, breeds at Fort Keogli (Tliorne, 1895, p. 217) ; numerous 

 on the Yellowstone and Musselshell (Allen, 1874, p. C8) ; coiiunon in Gallatin 

 County (Richmond and Knowlton, 1894, p. 306) ; rare in Teton County (Saun- 

 ders, 1914a, p. 138). 



The only date of migration published is from Fort Custer, May 15. 1885 

 (Cooke, 1909c, p. 260). The only nesting data are those of a nest and eggs found 

 at Fort Keogh, June 16 (Thorne, 1895, p. 217), and young out of the n'^st found 

 at Sedan, Gallatin County, July 28, 1909 (Saunders, 1911a, p. 43). In addition 

 to the above records I have found this species common in the Shields Rive)' 

 Valley of northern Park County. 



237. Spizella pusilla arenacea Chadbourne 



Western Field Sparrow 

 A rather rare summer resident of southeastern ^Montana. This is probably 

 one of the species that is characteristic of the Upper Sonoran zone. It is either 

 rare, or else it is overlooked by most observers. It is reported from Billings. 

 August 12, 1900 (Jones and Dawson, 1900, p. 32), L'rom the Long Pine Hills 

 along the South Dakota border (Visher, 1911, p. 14), and from Miles City, ^lay 

 11, 1902 (Hedges, coll. Univ. ^Montana). Tliese a})pear to he all tlic records. 



238. Junco aikeni Ridgway 



White-winged Junco 

 A permanent resident of southeastern ^Montana in the piiic hills. This spe- 

 cies was evidently first found in the state by C. F. IK'dgcs. there l)eing a series 

 of eleven specimens in the Cniversity of ^lontana colleclion, taK'en ])y him in th ■ 

 vicinity of .Aliles Cit.v between April 22 and 27, 1900. and a single specimen 

 from the same locality and date in the collection of L. B. Bishop. In November 

 and December, 1909, 1 found this species in the Long Pine Hills of Carter Coun- 

 ty, close to the South Dakota border, securing one i'or ideiit i fieat ion Deeeiiiher 

 5. The following sunniier the species was nott'tl again in that place, young lieini"; 

 found in the Long Pine Hills, July 20, 1910 (Visher, 1!)11, |). 14). The species 

 was again found there, and also on the ( 'ustei- .\a1ional i^'orest in Rosebud ( o\inty 



