81 
73. Sah grayish or Fi aut Sg A ae le brown...... 
. European Tree Sparrow. 
74. Gate En Bor eh with Bes in adult Ss Rta ree ash (75) 
74. Crown reddish, either wholly chestnut or speckled with 
Ploy GUM AE OAT Get! here eee eae ses eh as ADM OO. OS (76) 
75. Crown with a distinct gray median stripe........ Clay-colored Sparrow. 
75. Crown streaked Saag throughout, no trace of a median stripe. 
ee .Brewer Sparrow. 
76. react Sy a ge eeueal Zante tne wing- apauies lower 
ARLEN ME OMO Wig ages ad gs oh) ote slice tia wieMctwet amas wi tao CER) 
ACP ORSOeE MeO Ut GSP Ob. =< <usheirs nls Sab sa alales Sotelhe eb wees (78) 
77. Darker; the black streaks on back broader, with a considerable 
amount of rusty, especially on scapulars; crown chestnut, me- 
dian stripe but poorly defined; outer webs of tertials darker, 
more chestnut; edgings to tail feathers narrower, grayish; 
smaller, wing averaging under 23 inches............ . Tree Sparrow. 
77. Paler; the black streaks on back narrower, with very little rusty; 
crown cinnamon, median stripe generally well defined, gray- 
-ish; outer web of tertials paler, more buffy; edgings to tail 
feathers broader, almost white, Paced wing averaging over 22 
UM CHESS 2 si as): ; Spier . Western Tree Syartow: 
78. A blgele imac Mires eye; crown bake chestnut in adult 
(young with crown Enomazel and breast streaked).........(79) 
78. No black line through eye; crown rusty.........0......00: (80) 
79. Darker; ground color of back dark brown or rusty, crown darker 
chestnut, rump and sides of head mouse gray, black stripe behind 
eye broader; smaller, wing averaging under 2! inches...... 
Pe .Chipping Sean 
19. ele Laon alee ar acl pale ieeaee n panbort seh crown paler 
ORE rump and sides of head paler gray, black stripe behind 
eye narrower; wary wing averaging over 24 inches...... 
. Western Ceppine Sparowe 
80. ipper ee, more a ae crown fea rusty, rarely with 
an indication of a median stripe; back with much rusty 
and broader black streaks, under parts, especially the 
breast, more buffy; decidedly smaller, wing 24 to 23 inches, 
tail 2% to 22 inches inlength........:........ . Field Sparrow. 
80. Upper parts grayer, the crown dull rusty, with a broad gray 
median stripe, sometimes almost entirely gray; back mostly 
grayish, with narrower black streaks; under parts paler, the 
breast tinged with gray; decidedly larger, wing 2? to 24 
inches, tail 23 to 24 inches in length....Western Field Sparrow. 
81. Outer tail feather with some conspicuous white; a blackish dot on 
breast . re See ac Okano ese ae e Sparrows 
81. Outer tail eather pita Fakte EN yee PML Ase OnE ey Pt le Std a8 = (82) 
82. Breast bright yellow; throat,except white chin, black.Dickcissel. 
82. Breast without yellow; throat without black............., (83) 
