80 



59. Some distinct yellow on head and bend of wing (60) — no yellow 



anywhere (63) 



60. Bend of wing yellow, but none on head (61) — head with yel- 

 low (62) 



61. Back spotted and barred but not streaked with dusky; flanks 

 broadly streaked with rusty; tail feathers lightly barred with 



dusky Cassin Sparrow. 



61. Back indistinctly streaked with rusty on a gray background, these 

 streaks rarely with dusky centers; flanks not streaked and tail 



feathers with no indication of bars Bachman Sparrow. 



62. Front of median crown-stripe yellow; throat colored' as chest 



, Golden-crowned Sparrow. 



62. Upper lores yellow but none on median crown-stripe; a con- 

 spicuously contrasting, square, white throat-patch 



White-throated Sparrow. 



63. Crown either without median stripe, or the stripe very broad and 



pure white, bordered with black (64) 



63. Crown rufous with a lighter but not white, narrow median stripe . . (66) 

 64., With a median stripe (65) — without a median stripe, often 



solid black Harris Sparrow. 



65. Upper half of lores black or brown, cutting the white superciliary 



stripe White-crowned Sparrow. 



65 Upper half of lores white or ashy, continuous with the supercil- 

 iary stripe Intermediate Sparrow. 



66. Lower parts not distinctly streaked ; crown and back largely 



chestnut Swamp Sparrow. 



66. Lower parts conspicuously streaked (67) 



67. Breast finely marked with narrow sharp streaks not tending to form 

 a central spot and crossed by a broad cream buff band ...... 



Lincoln Sparrow. 



67. Breast rather heavily marked, these streaks forming or tending to 



form a central spot, no buff band (68) 



68. Larger; tail generally over 1§ inches long, and bill slenderer, 



less than J inch deep at base Mountain Song Sparrow. 



68. Smaller; tail generally under If inches, and bill about J inch 



deep at base (69) 



69. Upper parts paler, more gray, with very little or no rusty; super- 

 ciliary stripe and sides of neck whitish ; lower parts averaging 



less spotted Dakota Song Sparrow. 



69. Upper parts darker, with a conspicuous amount of rusty; sup- 

 erciliary stripe and sides of neck olive-grayish; lower parts 



averaging more spotted Song Sparrow. 



70. Lower parts not distinctly streaked (71) — distinctly streaked(84) 



71. Edge of wing pure white (72) — yellow or yellowish (81) 



72. Upper tail-coverts covering half of tail; a white wing-bar; 



male with throat black (73) 



72. Upper tail-coverts covering less than half of tail (74) 



