N0.1271. REVIEW OF THE HORNED LARKS— OBERHOLSER. 865 
and aurieiilars dull white, faintl}^ washed with yellow; throat pale 
yellow; sides and flanks tinged with cinnamon; rest of lower parts 
white. 
Adult female in hreeding ])lumage. — No. 142166, U.S.N.M., Biolog- 
ical Survey collection; Yuma, Arizona, April 10, 1889; V. Bailey, 
Upper parts sepia, streaked with buffy, most conspicuously so on 
occiput; cervix pale cinnamon, streaked with brownish; bend of wing 
and upper tail-coverts deep pinkish cinnamon; rest of plumage similar 
to the summer male, except that the black of the head is in the female 
replaced by brownish and bufl'y, and the black jugular crescent is 
smaller. 
Adidt 7nale in lolnteT 2)lumage. — No. 3652, collection of C. E. Aiken, 
Coyote Well, San Diego County, California, December 1, 1876; F. 
Stephens'. Similar to the breeding dress, but colors of upper parts 
more blended, this eflect produced b}^ the pale bufl'y or ochraceous tips 
of the feathers, the pinkish nape being almost entirely obscured; the 
throat is much more deeply yellow, which color suffuses the ear cov- 
erts, forehead, superciliary stripe, and slightly the crown behind the 
black. 
This new race is the palest of all the American horned larks, not 
excepting pallida itself, from which form it further differs in lacking- 
much of the cinnamomeous tinge of the upper parts, particularly on the 
cervix and bend of wing. Other characters distinguishing leucanslptlla 
from actia and amniophlht are the more uniform upper surface and 
the much more pinkish shade of the cervix, upper tail-coverts and bend 
of wing; from occidental h^ the decidedly smaller size; from adusta, 
the conspicuously less reddish upper surface; from leucolcema^ reduced 
size and more uniform upper parts. The single female of leucansiptila 
now at hand is difficult to tell from the same sex of leucolcBma except 
by its smaller size. Otocoris a. leucanslj)tlla is curiously similar to 
enthymki from North Dakota and Assiniboia, differing, however, in 
being smaller, much more brownish, and more nearly uniform above. 
That the form of Otocoris inhabiting the region about Yuma, Arizona, 
together with the contiguous area along the Mexican border, should be 
so diflerent from that of the mouth of the Colorado River, on the one 
hand, and adusta from the neighborhood of Fort Huachuca, on the other, 
is one of the surprises developed by the present investigation. Three 
of the specimens were collected by Dr. Edgar A. Mearns while acting 
as naturalist of the International Boundary Commission, and none of 
them were accessible to Dr. Dwight when he wrote his review of the 
group. Two winter specimens from Ash Meadows, in southern 
Nevada, though not quite typical of leucansiptila, are apparentl}^ much 
nearer this race than to either ammophila or leucolcBma. Whether or 
not they represent the breeding Otocoris of that locality is not at 
'This si>ecimen is not quite typical, verging somewhat toward actia, 
Proc. N. M. vol. xxiv— 01 55 
