434 NORTH AMERICAN BIRDS. 
of the peninsula); in winter, over whole of eastern United States to 
Gulf COASt .....ceeceeeceeeeseeeneeneee 585. P. iliaca (Mzrr.). Fox Sparrow. 
b*. Upper parts plain grayish brown or brownish gray, with wings, upper tail- 
coverts, and tail rusty brownish, or else continuously deep vandyke- 
brown; wing-coverts without lighter tips, and back without trace of 
streaks ;} markings on lower parts vandyke-brown; length 7.00-7.50, 
wing 3.00-3.50 (3.24), tail 2.85-3.20 (3.03), exposed culmen .43-.50 (.46), 
depth of bill .29-.32 (.30), tarsus .99-1.02 (1.00), hind-claw 42-50 (.46). 
Eggs .90 X .66, the brownish style comparatively rare (?). Hab. Pacific 
coast, breeding from southern Alaska (British Columbia?) to Unalashka ; 
south, in winter, to southern California. 
585a. P. iliaca unalaschcensis (GmEL.). Townsend’s Sparrow. 
a’. Wing shorter than tail; spots on chest, etc., smaller, more scattered. (Upper 
parts plain brownish gray, becoming rusty brownish on wings, upper 
tail-coverts, and tail.) 
b'. Larger, with longer tail and larger and much thicker bill; length 7.00-7.75, 
wing 3.10-3.45 (3.27), tail 3.30-3.80 (8.50), exposed culmen .43-.55 (.48), 
depth of bill .38-.45 (.40), tarsus .90-1.00 (.96), hind-claw .40-.52 (.46). 
Eggs .86 < .64, colored like those of P. unalaschcensis. Hab. Mountains 
of California, including eastern slope of Sierra Nevada. 
585d. P. iliaca megarhyncha (Bairp). Thick-billed Sparrow. 
6. Smaller, with smaller and slenderer bill; length 6.80-7.65, wing 3.05-3.35 
(3.20), tail 3.20-3.50 (3.34), exposed culmen .40-.49 (.43), depth of bill 
.29-.32 (31), tarsus .90-.96 (.93), hind-claw .40-.50 (.45). - Eggs .85 x 
.64, colored like those of P. unalaschcensis. Hab. Rocky Mountains, 
west across Great Basin (occasional in California during migrations) ; 
east, in winter, to Great Plains (Kansas, etc.). 
585c. P. iliaca schistacea (Bairp). Slate-colored Sparrow. 
(71.) Genus ARREMONOPS Rineway.’ (Page 385, pl. CX., fig. 6.) 
Species. 
Adult: Above plain olive-green, the top of the head with two dull chestnut- 
brown (lateral) and one grayish or olive-greenish (median) stripes; sides of head 
grayish, with a brown streak behind eye; lower parts dull white, strongly tinged 
anteriorly and laterally with pale buffy grayish; edge of wing bright yellow. 
a. Upper mandible reddish brown; legs and feet pale brown; stripes on crown 
entirely chestnut-brown, not sharply defined. 
b. Bill slender, its depth at base not more than .25; the length of upper man- 
dible from nostril to tip .35-.38; flanks pale grayish buff, or light gray- 
1 Except in specimens approaching P. iliaca ; such are sometimes almost undistinguishable as far as color 
is concerned from P, schistacea except by the brown or rusty streaks on back; the proportions, however, may 
apparently always be relied upon to distinguish them. 
2 See Appendix, page 605. 
