128 PACIFIC COAST AVIFAUNA No. 14 



first supposed, and the answer to this (juestion coidd he l)est worked out hy 

 eoliecting on the breeding' ranges in Montana. 



Dates for the migration of this form are as follows : Silver Bow ( "ounty, 

 .March 10 to April 5, 1910; Bozeman, April 20, 1909, and April 2, 1911; Cho- 

 teau, April 2, 1912; Helena, March 23, 1915 (Kittredge, MS) ; Bozeman, October 

 9, 1908 ; Jefferson County, September 27 to October 13, 1909 ; Powell and Deei- 

 Lodge counties, September 8 to October 14, 1910; Neihart, October 7, 1915 

 (Kittredge, MS) ; Corvallis, April 17, 1911 (Bailey, MS). 



The only notes on the breeding of this form are of a nest and four eggs at 

 Belton, May 26, 1914, of which the eggs hatched May 30, and the young left the 

 nest June 12 ; and of another nest with two eggs found at the same place July 

 2. 1915 (DuBois, MS). 



243. Junco hyemalis mearnsi Ridgway 



Pink-sided Junco 



A common sunnner resident of the mountains of southwestern Montana. 

 The exact range of this form is not completely worked out,, but in the western 

 half of the state it probably ranges north to about the line of the Northern Paci- 

 fic Railroad between Helena and Missoula. East of the continental divide it may 

 range north to the northern border of the state in the more eastern mountain 

 ranges, but the subspecies in these ranges has not been determined. Mearnsi 

 has been found breeding in the Big Horn Mountains (Merrill, 1881, p. 205) ; in 

 Gallatin County (Richmond and Knowlton, 1894, p. 306) ; in Jefferson, Silver 

 Bow", Deer Lodge and southern Powell counties (Saunders, 1912a, p. 29), where 

 it breeds north at least as far as Gold Creek; and in Park County. It has also 

 been found at Helena and in the Bitterroot Valley in migration. 



The migrations take place in ]\Iarch and April, and in September and Octo- 

 l)er. Spring dates are : Bozeman, April 11, 1909 ; German Gulch, Silver Bow- 

 County, March 23, 1910; Helena, March 26, 1911; Corvallis. March 22, ]f>13 

 a^ailey, MS). Fall: Tom Minor Basin, Park County, Oetobei' 21, 1908; Home- 

 stake, Jefferson County, October 23, 1909; Willow Ci'edc, Powell County. Sep- 

 tember 25, 1910. 



Only two nests are on record. One found in the Big Horn INIountains con- 

 tained five eggs advanced in incubation June 13, 1880 (Merrill, 1881, p. 205). 

 A nest with four eggs advanced in incubation was found in the Bridger Moun- 

 tains, Gallatin County, July 19, 1908 (Saunders, 1911a, p. 43). I have found 

 young out of the nest and on the wing in Jeffei-son County. June 24, 1910. and 

 again July 11, 1910. 



244. Amphispiza nevadensis nevadensis (Ridgway) 



Sage Sparrow 



A locally connuon summer resident in southern Montana. Tliis bird has 



been found, so far, only in Gallatin and Park counties, but it probably occurs in 



other neighboring counties both eastward and westward. The fact that it occurs 



in Fremont County, Idaho (Rust, 1917, p. 39") indicates that it sliould almost 



