AMMODRAMUS. 409 
g’. Bill smaller and more slender (usually less than .22, 
and averaging only .21, deep at base). 
WM, Paler and grayer, averaging more so than A. 
sandwichensis ; length 4.75-5.90, wing 2.65- 
2.90 (2.80), tail 1.95-2.30 (2.14), exposed cul- 
men .37-.40 (.39), depth of bill at base .20- 
.22 (.21), tarsus .75-.85 (.80). Eggs .75 x .55. 
Hab. Western North America, except (in 
general) Pacific coast; breeding from Rocky 
Mountain plateau north to the Yukon district 
of Alaska, migrating south, in winter, to 
Mexico..... 5426. A. sandwichensis alaudi- 
nus (Bonap.). Western Savanna Sparrow. 
#?. Darker and browner, averaging more so than A. 
savanna, with the breast and sides usually 
more heavily (sometimes more thickly) 
streaked, the whole head often suffused with 
yellow; wing 2.50-2.75 (2.65), tail 1.95-2.15 
(2.02), exposed culmen .40-.43 (.41), depth of 
bill at base .21-.25 (.22), tarsus .65-.80 (.79). 
Liggs .75 X 56. Hab. Salt marshes about 
San Francisco Bay, California. 
542c. A. sandwichensis bryanti Rinew. 
Bryant's Marsh Sparrow. 
é. Superciliary and median crown-stripes usually very indistinct 
(sometimes nearly obsolete); longer lower tail-coverts 
streaked with black (streaks rarely concealed). 
Similar to A. sandwichensis bryanti, but upper parts more 
heavily streaked with black on a much more uniform 
and more olivaceous brown ground, sides of head and 
neck darker, anterior portion of superciliary stripe 
duller, more olivaceous, yellow, lower parts more 
thickly and heavily marked with black, wing and tail 
shorter, and bill larger; length about 5.00-5.25, wing 
2.45-2.70 (2.58), tail 1.80-2.10 (1.97), exposed culmen 
A0-.50 (.44), depth of bill at base .21-.25 (.23), tarsus 
78.85 (.82). Hab. Salt marshes of southern Califor- 
nia, south to Todos Santos Island, Lower California. 
543. A. beldingi Rincw. Belding’s Marsh Sparrow. 
ce, Culmen regularly curved from the base, without depression in middle 
portion, the bill more swollen; primaries exceeding secondaries by 
less than length of exposed culmen; upper parts indistinctly streaked 
with darker. 
@, Bill from nostril .36, or more; depth of bill at base .26, or more; 
general color above light brownish gray or grayish brown; 
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