858 PROCEEDINGS OF THE NATIONAL MUSEUM. vouxxiv. 
Verde, Arizona, are typical, that is, they represent the extreme differ- 
entiation of the race; and breeding l)irds from the Little Colorado 
River and San Francisco Mountain are to be referred here. These 
localities comprise all in Arizona from which breeding specimens have 
been seen, ])ut the summer distribution of occldentalis may with reason- 
able safety })e held to be the Territories of Arizona and New Mexico, 
excepting the southern and extreme western parts of the former, and 
the eastern and far southern portions of the latter. O. a. leucoJwina^ 
however, possibly encroaches on the northwestern corner of Arizona, 
but just how far the present material does not indicate. 
In winter occldentalis occurs in Texas and also moves to the south- 
ward into the central portions of northern Mexico, as far as the city 
of Chihuahua, ])eing found there in company with aphrasta^ adusta^ 
and leueolmma. The large number of intermediates causes considerable 
trouble in the identification of winter horned larks from northern 
Mexico. 
Sixty-five specimens have l)een examined, from the following 
localities: 
Arizona. — Big Chino Valley, near La Ventana ranch, Pima County 
(United States and Mexican boundary line); Buenos Ayres, Pima 
County (United States and Mexican boundary line); San Pedro River; 
Willcox; San Francisco Mountain;* Lochiel, Pima County; Fort 
Verde;* Little Colorado River.* 
Neui Mexico. — Albuquerque;* Fort Wingate;* Grafton; Zuni; 
Santa -Fe;* Fort Bayard; Silver City. 
Texas. — Marfa; El Paso; Laredo; Sierra Blanca; Comanche; Hen- 
rietta. 
Cldhm^lma. — San Luis Spring, Animas Valley (United States and 
Mexican boundary line); Chihuahua; San Diego. 
Sonora. — La Noria, Santa Cruz River (United States and Mexican 
boundary lino). 
OTOCORIS ALPESTRIS ADUSTA Dwight. 
Otocoris alpcslris adttsla Dwight, Auk, VII, April, 1.S90, p. 148. — Ridgway, Man. 
N. Am. Birds, 2d ed., 1896, p. 599 (part). 
Chars, suhsp. — Similar to Otocoris a. occidentalis^hxxt nuich smaller, 
the upper surface more reddish. 
Meaxurements {lo males). — Wing, 97-105.5 (average, 102.4) mm.; 
tail, 65-73 (average, 68.8) nmi.; exposed culmen, 10-12 (average, 10.8) 
mm.; tarsus, 20.5-22 (average, 21.2) mm.; middle toe, 10-12 (average, 
11.3) mm. 
Type locality. — Camp Huachuca, Arizona. 
Geographical distrihution. — In summer, the central part of extreme 
southern Arizona; in winter, northern Sonora and Chihuahua, Mexico. 
Description.— Adult male in hreeding plumage.— "Yy^^^ No. 23575, 
