860 PROCEEDINGS OF THE NATIONAL MUSEUM. voi.xxiv. 
rather paler, decidedlj" more ochraceous coloration, particularly above, 
and in the less blackish crown. 
This subspecies occupies, in the breeding season, a very restricted 
area, more restricted, in fact, than most of the other continental forms; 
and to this is due, of course, its comparative rarity. It is only in part 
intermediate l)etween occidentalU and apJiraxta, and is one of the best 
defined of the races of aljyestris. Breeding birds from the type localit}^ 
are remarkably uniforui and represent the extreme of differentiation, 
while nearly all those from other places show more or less indication of 
intergradation with surrounding forms. Specimens from the Santa 
Rita Mountains, Arizona, are generally larger and paler, and seem 
thus to incline somewhat toward leuconsiptila. A June female from 
Oracle, Arizona, appears to be quite typical, though a good series 
might show" the breeding horned larks from this localit}" to be some- 
what al)errant. A young bird from Oracle strengthens this suppo- 
sition, although, as we have already intimated, no great amount of 
reliance can be placed upon the identification cf a single young indi- 
vidual. In autumn and winter adu><t(i wanders to the southward, as 
far, at least, as the city of Chihuahua, Mexico, but does not seem to 
range much to the east or west. 
Considerable individual variation is evident, consisting chiefly in the 
more or less scorched appearance of the back. The throat varies from a 
deep primrose yellow to occasionally almost white. Females exhibit 
a similar difference, observa])le in the depth of the cinnamon suffusion 
perv^ading the entire upper surface; the back and head are sometimes 
almost uniform, while in many cases the former is quite dark owing 
to )n-oad Ijrown centers of the feathers, there being then a noticeable 
contrast between the head and back. 
Thirty-seven specimens have been examined, these representing the 
localities given below: 
Arizona. — Fort Huachuca;* San Pedro River (United States and 
Mexican boundary line); Santa Rita Mountains;* Oracle;* Great- 
erville.* 
Chi/i ualma. — Chihuahua Cit}'. 
Sonora. — Santa Cruz River (United States and Mexican boundary 
line). 
OTOCORIS ALPESTRIS APHRASTA, new subspecies. ■ 
Chars, suhftp. — Like Otocoria alpestrh adusta^ but back less reddish, 
cervix and bend of wing more pinkish. 
Mmmremeids {lo males). — Wing, 99-104.5 (average, 102) mm.; tail, 
61:-72 (average, 68.5) mm.; exposed culmen, 10.5-12 (average, 11.2) 
nmi.; tarsus, 20.5-22.5 (average, 21.3) nmi.; middle toe, 10-12 (aver- 
age, 11.1) mm. 
Type locality. — Casas Grandes, Chihuahua, Mexico. 
