102 BIRDS OF SOUTH DAKOTA 
462. WesTERN Woop PEWEE (Myiochanes richardsoni richardsoni.) 
Found in the Black Hills. Similar to the preceding but 
duller, and seldom shows the green or yellow tinge. Nesting 
habits the same. 
464. WESTERN FLYCATCHER (Empidonax difficilis difficilis.) 
This is also a western form found in the Black Hills. 
Among the smallest of our Flycatchers. General appearance | 
gray, but yellowish on back and under parts. 
466. “TRaILt’s FLycaATCHER (Empidonax trailli trailli.) 
This is a western species but nests frequently in the 
State. About six inches in length. Upper parts are gray tinged 
with brown; below, white and gray. 
466a. ALDER FLYCATCHER (Empidonax trailli alnorum.) 
This is an eastern form but there are specimens in the 
University Museum from Walworth, Sanborn and Clay coun- 
ties which have been identified by Mr. H. C. Oberholser of the 
United States Biological Survey. It is about six inches in length. 
Above, grayish; wings and tail not as dark as in most Flycatch- 
ers; below, whitish. 
467. Least FLycaTCHER (E mpidonax minimus.) 
Sometimes called “Chebec” from the similarity of its vigo- 
rous note to this word. Smallest of the Flycatchers and with 
tail slightly forked. Similar in color to the Alder Flycatcher. 
It places its nest in the fork of tree or bush. 
FAMILY ALAUDIDAY. LARKS 
There are fourteen species and subspecies of Larks in the 
United States. Two of the latter are common to South Dakota, 
the Prairie Horned Lark to the eastern part of the State, and the 
Desert Horned Lark to the western portion. 
The Horned Lark, sometimes calied “Shorelark,” is named 
from the two tufts of feathers on its head which, when raised 
slightly, simulate horns. It is a modest but well marked bird of 
fine spirit, and the only Lark native to this country (the Mead- 
owlark is a Starling, and the Skylark is a straggler from the Old 
