The Migration of North American Birds 347 



interior of the western United States, and north to southern Alberta; west to 

 western Montana and western Nevada; south to south-central Nevada, 

 southern Utah, southern Colorado, eastern and central southern New Mexico, 

 and central western Texas; and east to central northern Texas, central Colorado, 

 central Wyoming, and central Montana. In winter it ranges south to south- 

 eastern California, Sonora, Chihuahua, and southern Texas. 



The Montezuma Horned Lark (Otocoris alpestris occidentalis) breeds 

 in central New Mexico, west to central Arizona. It ranges south in winter to 

 northern Sonora, northern Chihuahua, and central western Texas. 



The Chihuahua Homed Lark {Otocoris alpestris aphrasta) is resident in 

 the southeastern corner of Arizona, the southwestern corner of New Mexico, 

 and southeast through Chihuahua to Durango and southern Coahuila. 



The Scorched Homed Lark {Otocoris alpestris adusta) breeds in central 

 southern Arizona and winters south to northern Sonora and northern Chi- 

 huahua. 



The Bleached Homed Lark {Otocoris alpestris leucansiptila) is resident 

 in the southwestern corner of Arizona, the northeastern corner of Lower 

 California, and north through the extreme western edge of Arizona, and the 

 southeastern border of California to southern Nevada. 



The Mojave Homed Lark {Otocoris alpestris ammophila) breeds in south- 

 ern California from the Mojave Desert north to Owens Valley, and winters 

 south to the Mexican Border. 



The California Homed Lark {Otocoris alpestris actia) is resident in middle 

 and western California, north to San Francisco, and south to the Pacific side 

 of northern Lower California. 



The Magdalena Homed Lark {Otocoris alpestris enertera) is resident on 

 the Pacific side of central and southern Lower California. 



The Island Homed Lark {Otocoris alpestris insularis) is resident on the 

 Santa Barbara Islands, Calif. 



The Ruddy Homed Lark {Otocoris alpestris rubea) is resident in the mid- 

 dle portion of the Sacramento Valley in central northern California. 



Merrill's Homed Lark {Otocoris alpestris merrilli) breeds in the north- 

 western United States, and north to south central British Columbia; west to 

 central Washington and central Oregon; south to northeastern California; and 

 east to northwestern Nevada, central Idaho, and northwestern Montana. In 

 winter it goes as far south as central California. 



The Streaked Homed Lark {Otocoris alpestris strigata) breeds in western 

 Washington and western Oregon. It ranges south in winter to northern Cali- 

 fornia and east to eastern Washington and eastern Oregon. 



The accompanying map shows more graphically the breeding ranges of the 

 various North American Horned Larks. Some of the western races seem to be 

 strictly resident ; but most of the others arc more or less migratory; and several 

 subspecies thus may be found at the same season in one h)cality. Owing to 



