434 NORTH AMERICAN BIRDS. 



of tho peninsula); in winter, over whole of eastern United States to 



Gulf coast 5S5. P. iliaca (Mkkr.). Fox Sparrow. 



6'. Upper parts plain grayish brown or brownish graj-, with wings, upper tuii- 

 covcrts, and tail rusty brownish, or else continuously deep vandj-ke- 

 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 (AC). 

 depth of bill .29-.32 (.30), tarsus .99-1.02 (1.00), hind-claw .42-.50 (.40;. 

 Hggs .90 X -GG, the brownish style comparatively rare (?). Jfab. Pacific 

 coast, breeding from southern Alaska (British Columbia?) to Unalashka; 

 south, in winter, to southern California. 



585a. P. iliaca unalaschcensis (G.mel.). 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 3.10-3.4^5 (3.27), tail 3.30-3.80 (3.50), exposed culmen .43-.55 (.48), 



depth of bill .38-.45 (.40), tarsus .90-1.00 (.96), hind-claw .40-.52 (.40). 



Bggs .86 X -64, colored like those of P. vnalaschcensis. Hub. Mountains 



of California, including eastern slojie of Sierra Nevada. 



5S56. P. iliaca megarhyncha (Baird). Thick-billed Sparrow. 

 b''. Smaller, with smaller and slenderer bill; length 6.80-7.05, 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. Ilab. Eocky Mountains, 

 west across Great Basin (occasional in California during migrations); 

 east, in winter, to Great Plains (Kansas, etc.). 



585c. P, iliaca schistacea (Baird). Slate-colored Sparrow. 



(71.) Genus ARREMOMOPS Ridgw.vy.' (Page 385, pi. CX., fig. 6.) 



Species. 



Adult : Above plain olive-green, tho 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 ej-e ; 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 sharjjly defined, 

 t'. Bill slender, its depth at base not more than .25 ; the length of ii]i]u'r man- 

 dible from nostril to tip .35-.38; flanks pale grajnsh but!', or light gray- 



' E.xccpt in specimens approaching P. illnen ; such arc sometimes almost undistinguishablo as far as color 

 is concerned from /'. nchiniacea except by the brown or rusty strcal«8 on back; tho proportions, however, may 

 apparently always bo relied upon to distinguish them. 



' Sco Appendix, page 605. 



