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90 PACIFIC COAST AVIFAUNA No. 14 



ties (Saunders, 1912a, p. 27); from Teton County (Saunders, 1914a, p. 1-35); 

 and from Flathead Lake (Saunders, 1916c, p. 85). In eastern Montana it was 

 found at Fort Keogh, an adult being taken July 17 and a young bird June 8 

 (Thome, 1895, p. 215). 



This s])ecies nests in the Transition and ('anadian zones of llie inouiitaiiis. 

 being usually found at a little higher elevation than uTifjIiti. Tlie nest has bi'^n 

 found in the mountains of Gallatin County, where four eggs, somewhat advanced 

 in incubation, were secured July 2, 1909. Another ne?l was found at Flathead 

 Lake, June 26, 1915. It contained eggs at that date, and young the second week 

 in July, but how uiany was not ascertained (Saunders, 1916c, p. 85). 



The only migration date I have for this species is from German Gulch. Sil- 

 ver Bow County, ^lay 28, 1910. The latest dates of its occurrence on record ai'c 

 that of Coues, given above, and August 19-20, 1890, in Gallatin County (Rich- 

 mond and Knowlton). 



180. Empidonax wrighti Baiid 



WKKillT FlVCATCUEK 



A common sunuuer resident of the western half of the state, Found mainly 

 in the Transition zone in the foothills and lower mountain slopes. The eastern- 

 most records are Teton and Lewis and Clark counties (Saunders. 1914a, p. 135), 

 Gallatin County (Richmond and Knowlton, 1894, p. 804), and Park County, 

 where it occurs in the footliills on the west side of tlie Yellowstone. It has ])een 

 recorded by most observers in the western part of the state, but is not noted from 

 the Bitterroot Valley, nor from the Big Hole Basin. 



The nest, has been found repeatedly at Flathead Lake. Four nests were 

 Found from June 15 to 25, 1900, containing from three to five eggs (Silloway, 

 1901a, p. 26, and 1901b, ]>. 6). 



This species usually arrives in ^May, and indications are that its migration 

 is considerably earlier on the west side of the divide than on the east. At Colum- 

 bia Falls the average date is May 7, and the earliest April 24, 1895 (Cooke, 1908, 

 {). 77). At Missoula, May 9 is given as the earliest date of arrival (Kittredge^ 

 MS). At Anaconda it was noted May 14, 1911. Fast of ttie divide dates are: 

 Bozeman, ]\Iay 27, 1909, and Choteau, May 22, 1912. Tiie fall migration is evi- 

 dently in August, August 20 being the latest date at Missoula (Kittredge, ^fS). 

 Specimens were taken August 19-20, 1874, in the Rocky Mountains along the 

 northern border of the state f Coues, 1874b, p. 612). 



181. _ Otocoris alpestris arcticola (Jjinnaeus) 



i*Aij.iD Horned Lark 

 A winter visitor tlwoughout the state, [)i'()l)a])ly (piite eoiniuou in most local- 

 ities, but not always distinguished and separated from wintering examples of 

 l( ucolaciiKi. Apparently commoner in tlie mountain valleys of western "Montani 

 than on the prairies. In eastern Montana, JrucoUKina seems to be the ])revailiiig 

 winter form. At Fort Keogh, 118 specimens, taken in every month of the year, 

 l)roved to belong to that race (Thorne, 1895, ]>. 215). Camei-oti does not list tliis 

 race from Custer and Dawson counties, but there is a speciincu taken at .Miles 



