EGGS OF NORTH AMERICAN BIRDS. HI 



not varying appreciably from those of No. 567. Breeds in 

 the Rocky Mountain region of Idaho and Montana. 



569. Gray-hbaded Junco, Junco caniceps. Eggs, similar 

 to those of No. 567, excepting that they are usuiily less dis- 

 tinctly spotted, and the nests and nesting habits are similar. 

 Breeds in the Rocky Mountain region, fi-oni the Black Hills to 

 the Wasatch and Uintah Mountains. 



570. Arizona Junco, Jiinco cinereus 2)aUiattts. Eggs, 

 greenish white, unspotted ; .75 -f- .58 to .78 -\- .60. Breeds in 

 the mountains of Southern Arizona. 



570a. Red-backed Junco, Junco cinereus dorsalis. Eggs, 

 4 or 5, oval, greenish white, finely sprinkled, usually in a ring 

 around the larger end, with reddish brown ; .58 -{- .75 to .60 

 -|- .78. Breeds in the mountains of New Mexico and Eastern 

 Arizona. 



571. Baird's Junco, Junco haircli. Eggs, unknown. 

 Breeds in Lower California. 



572. Guadalupe Junco, Junco insulan's. Eggs, according 

 to Ridgway, are whitish, spriid^led, chietiy on tlie larger end.^ 

 with reddish brown; ,59 -f- .80. Breeds on the Guadalupe 

 Island, Lower California. 



573. Black-throated Sparrow, Amphispiza bilineata. 

 Eggs, 3 or 4, oval, or rounded oval, bluish white, unspotted ; 

 .53 -]- .70 to .60 -|- .75. Distinguished by the rounded oval 

 form and plain bluish white color. Nests placed in bushes, 

 composed of grass and weeds. Breeds in Western United 

 States, from Western Texas and the Indian Territory, west to 

 California, north thi'oughout the Great Basin, in June. 



574. Bell's Sparrow, Amphispiza belli. Eggs, 3 or 4, 

 rounded oval, pale greenish blue, finely spotted with reddish 

 brown ; .60 -\- .80 to .62 -\- .82. Nests ])laced in bushes, com- 

 posed of weeds, lined with grass and hair. Breeds in Cali- 

 fornia, in May and June. 



574«. Sage Sparrow, Amphispiza belli nevadensis. Eggs, 

 indistinguishable from those of No. 574, and the nests and 



