268 BULLETIN 146^ UNITED STATES NATIONAL MUSEUM 



(Stump Lake and probably Hankison) ; western South Dakota 

 (Edgemont) ; Nebraska (probably Harrison, probably Marsland, 

 North Platte, and Kearney) ; Kansas (Colby, Oakley, probably Hays, 

 Garden City, and probably Fort Dodge) ; and Oklahoma (probably 

 Camp Supply and Fort Cobb). South to Oklahoma (Fort Cobb) ; 

 Texas (Washburn, Hereford, and probably Fort Davis) ; New 

 Mexico (Otero County and Socorro County) ; and probably Arizona 

 (Fort Whipple). West to probably Arizona (Fort Whipple) : Colo- 

 rado (probably Del Norte, Denver, Barr, and Loveland) ; Wyoming 

 (Cheyenne, Laramie, probably Fort Bridger, and probably Dubois) ; 

 Idaho (Pahsimeroi Valley) ; and Montana (Three Forks and Great 

 Falls). 



Winter range. — The mountain plover has the curious habit of 

 occupying a winter range that is farther west than its summer home. 

 North to California (probably rarely Marysville) ; Arizona (Santa 

 Rosa, Buenos Ayres, and Allaires Ranch) ; and Texas (San Antonio). 

 East to Texas (San Antonio, Eagle Pass, Aransas River, and 

 Brownsville) ; Tamaulipas (Matamoras) ; and Zacatecas (Zacate- 

 cas). South to Zacatecas (Zacatecas); and Lower California (La 

 Paz). West to Lower California (La Paz) ; Sonora (Santa Rosa and 

 Hermosillo) ; and California (San Diego, Santa Ana, Los Angeles, 

 Fort Tejon, Alila, Paicines, probably Stockton, and probably rarely 

 Marysville). 



jSpring migration. — Sufficient data are not available to clearly 

 define the migratory flights of the mountain plover but among early 

 dates of spring arrival are : Oklahoma, Norman, March 15 ; Colorado, 

 Loveland, March 18, Burlington, March 22, Barr, March 23, Spring- 

 field, March 29, Denver, April 6, and Colorado Springs, April 19; 

 Wyoming, Cheyenne, April 5, Big Piney, April 12, and Fort San- 

 ders, April 21; South Dakota, Huron, April 16; and Montana, Big 

 Sandy, May 4, and Fort Custer, May 12. 



A late date of spring departure from California is Santa Ysabel, 

 April 3. 



Fall migration. — Early dates of fall arrival in California are: 

 Firebaugh, September 11, and Montebello, September 15. 



Late dates of fall departure are Montana, Sun River, September 4, 

 Camp Thome, on the Yellowstone, September 13, and Big Sandy, 

 September 18; South Dakota, Forestburg, September 20; Nebraska, 

 Monroe Canyon, September 27; Wyoming, Efell, September 4, and 

 Sweetwater, September 13; Colorado, Barr, October 12, and Beloit, 

 October 15 ; and New Mexico, Santa Rosa, September 27, and Stink- 

 ing Spring Lake, October 1. 



Casual records. — The mountain plover has been detected outside 

 of its normal range on but few occasions, three of which, curiously 



