1910] Grinnell—Savannah Sparrow of the Great Basin. 315 
throat, pectoral region, and flanks; sides and top of head with 
whitish ground, upon which the black streaking is sharply de- 
fined; anterior part of superciliary stripe pale canary yellow; 
whole back, wings and tail with feathers centrally fuscous or 
dull blackish and with conspicuous edgings of either whitish or 
pale clay color or both; outer web and tip of outermost rectrix 
white, and next three inner rectrices outwardly margined and 
tipped with white but successively more narrowly. This feature 
is possessed by 19 out of the 21 breeding examples of nevadensis, 
at hand. Wing, 71.5; tail, 48.8; tarsus, 19.7; hind toe and claw, 
14.3; culmen, 10.0; gonys, 6.7; depth of bill at base, 5.7. 
A selected specimen of P. s. alaudinus (male; no. 4599, Univ. 
Calif. Mus. Vert. Zool.; Forty-mile, Yukon Territory, Canada; 
May 7, 1898; C. L. Hall) in parallel plumage is very much 
browner, owing to the presence of extensive pale hazel, mar- 
gining the black shaft streaks both above and below; the flanks, 
pectoral region and sides of head have the ground color white 
distinetly tinged with pale buff; and the whole upper surface 
has the outer feather edgings of clay color instead of whitish; 
the superciliary stripe is strongly yellowish; the outermost tail 
feathers are not conspicuously edged with white. Wing, 72.5; 
tail, 52.8; tarsus, 20.6; hind toe with claw, 16.0; culmen, 10.7; 
gonys, 7.1; depth of bill at base, 5.5. 
To summarize from the above descriptions: Passerculus 
sandwichensis nevadensis differs from its presumably nearest 
relatives in its extremely pale coloration. This paleness is not 
due to a less amount of black-streaking, but to a replacement 
of buff and clay color by white or whitish and to a restriction, 
and dilution to clay eolor, of the hazel areas on each feather. 
The appearance of white edges on the rectrices is a remarkable 
feature, showing an incipieney of the condition among certain 
terrestrial birds where the outer rectrix on either side is chiefly 
white, as in Pooecetes. 
RANGE. 
I have handled breeding specimens of P. s. neva- 
densis only from Humboldt and Washoe counties, Nevada. But 
I believe that it is the same form which breeds in suitable local- 
ities throughout the Great Basin. Winter or spring. specimens 
_ unequivocally of this form are at hand only from Mecea on the 
