No.127]. REVIEW OF THE HORNED LARKS— OB ERHOLSER. 855 
bird. From cTirysolcema it differs in conspicaousl}^ more rufescent, 
more uniform colors above, and in smaller size. 
The young- of oaxacm resemble those of actia^ but are everywhere, 
even on the under surface, more strongly tinged with ochraceous; the 
crown seems to be less ])lackish. 
It is certainly strange that there should be an}" notal^le local variation 
in the horned larks from a locality close to the city of Oaxaca, whence 
come specimens apparently inseparable from Otocoris alpestris oaxacce^ 
a locality, moreover, which lies practically between the cit}" of Oaxaca 
and San Mateo, the type locality of oaxacw,' yet the differences exhib- 
ited by the horned larks from Mitla, Oaxaca, are scarcely reconcilable 
with ordinary range of individual variation, neither can they be con- 
sidered as the result of abrasion during the breeding season. The 
series from this place was taken in June, only a few days later than 
the specimens from the city of Oaxaca, so that these birds are strictly 
comparable. The specimens from Mitla are, so far as color is con- 
cerjied, not in any degree intermediate between the only two sub- 
species whose areas of distribution can by the slightest possibility be 
contiguous, being much paler than either oaxacw or chrysolmina. 
They are much more rufescent above than the latter, and agree in size 
with the former. They are almost perfectly identical with the non- 
typical examples of actia from Santa Rosalia Bay, Lower California, 
which are in turn almost inseparable, though geographicallj^ isolated, 
from amniophila. In view of this condition of affairs it seems best to 
consider these Mitla specimens as belonging to oaxacm^ which form 
they more nearly approach than to ekrysoJcema. A female from the 
ty]:»e locality of oaxacce, worn and faded almost beyond recognition, is 
in the U. S. National Museum collection, and is probably the specimen 
which Dr. Dwight referred provisionally X.o jMllida} 
A series of eight males from the type locality exhibits no important 
individual variations, the chief differences observable being the some- 
what more pinkish nape or less reddish back of some specimens. 
The eyebrow, even in females, appears never to lack a tinge of yellow, 
while the feathers of the tibia, at least in summer, show rarel}^ any 
noticeable trace of this color. 
Twenty-one specimens have been examined, from the localities 
which follow: 
6>aa:'«m.— San Mateo del Mar;* Oaxaca;* Mitla.* 
OTOCORIS ALPESTRIS OCCIDENTALIS (McCall). 
Otocoris f occidentalis McCall, Proc. Acad. Nat. Sci. Phila., June, 1S51, p. 218. 
Otocoris alpestris occideivtalis Stone, Proc. Acad. Nat. Sci. Phila, 1899, p. 21. 
Eremophila alpestris b. leucolsema Coues, Birds Northwest, 1874, p. 38 (part). 
Otocorys alpestris arenicola Henshaw, Auk, I, July, 1884, p. 259 (part). 
Otocoris alpestris adiisla Dwight, Auk, VII, April, 1890, p. 148 (part). — Ridgway, 
Man. N. Am. Birds, 2 ed., 1896, p. 599 (part). 
'Auk, 1890, VII, p. 1.5.5. 
