90 PACIFIC COAST AVIFAUNA No. 14 



lies (Saunders, 1912a, p. 27) ; from Teton County (Saunders, 1914a, p. 135) ; 

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

 Found at Fort Keogh, an adult being tal^en July 17 and a young bird June 8 

 (Thorne, 1895, p. 215). 



This species nests in the Transition and ("anatliau zones ot the mountains, 

 hi'ing usually found at a little higher elevation than irrigliti. The nest has bei-n 

 found in tlie mountains of Gallatin County, where four eggs, somewiiat advanced 

 in incubation, were secured July 2, 1909. Another nesi was fonnd at Flathead 

 Lake, Jinie 2ti. 1915, It contained eggs at that date, aud young the second week 

 in July, liut how many was not ascertained (Saunders, 1916c, p. 85). 



The only migration date I have for this species is from German Gnlch, Sil- 

 ver Bow County, May 28, 1910. The latest dates of its occurrence on record are 

 tiuit of Cones, given above, and Angust 19-20, 1890, in Gallatin County (Kicli- 

 mond and Knowlton). 



180. Empidonax wrrighti liaird 



Wright Fi-YC.\TcnEi5 



A common sunniier resident of the western half of the state. Found mainly 

 in tiie 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. 304), and Park County, 

 where it occurs in the foothills on the west side of the Yellowstone, It has been 

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

 the Bitterroot Valle.v, 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, p. 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. East of the divide dates are: 

 Bozeman, May 27, 1909, and Choleau, I\Iay 22. 1912. The fall migration is evi- 

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

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

 northern border of the state (Coues, 1874b. |i, 612). 



181. Otocoris alpestris arcticola (Linnaeus) 



P.vLLiD Horned Lark 

 A winter visitor throughout the state, probably quite common in most local- 

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

 Iruidliii ma. Apparently commoner in the mountain valleys of western Montana 

 than on the prairies. In eastern Montana, leucolacma seems to be the prevailing 

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

 proved to belong to that race (Thorne, 1895, p. 215). Cameron does not list this 

 face from Cu.ster and Dawson counties, but there is a siiecimen taken at Miles 



