NORTH AMERICAN BIRDS. 349 



some of the larger Vireos. Mr. Norris has a set of four eggs, which 

 was taken in Merriinack county, New Hampshire, May 29, 1884. 

 These are white, with a faint creamy tinge ; they are very much pointed 

 at the smaller ends. The markings are in the form of wreaths of 

 chestnut specks around the larger ends. Sizes, .81 x .52, .79 x .51, .80 

 x-5i, .80 x .52. 



6290. Vireo solitarius cassinii (XANTUS.) [1410;.] 



Cassin's Vireo. 



Hab. Western United States, from the Rocky Mountains to the Pacific. 



During the breeding season, which is in May, June, and July, this 

 bird is confined chiefly to the Pacific Coast region. Mr. A. W. Anthony 

 gives it as a common summer resident of Washington county, Oregon, 

 where it frequents the coniferous growth, and is often found in the 

 alders and aspens. He states that it is more common than the 

 Warbling Vireo. Nests were found in oaks and alders. About Fort 

 Klamath, Oregon, Dr. Merrell says that the bird shows a marked 

 predilection for pines and firs, and is also found, but much less fre- 

 quently, in aspen groves, with Vireo gilviis swainsoni. The nests and 

 eggs of this species resemble those of the Warbling Vireo. The eggs 

 measure .80 x .58 Mr. Norris has a set of three eggs of this species in 

 his cabinet that was taken June 10, 1888, near Fort Klamath, Oregon. 

 They are white, sparsely speckled with burnt umber; sizes, .77 x .55, 

 .74 x .55, .83 x .60. The last egg is abnormally large. 



629 b. Vireo solitarius plumbeus (COUES.) 



Plumbeous Vireo. 



Hab. Rocky Mountain region of the United States; south in winter into Mexico. 



This sub-species is abundant in the Rocky Mountain region of 

 the United States, especially the southern portion, breeding in the 

 pine districts up to an altitude of 9000 feet. In suitable localities in 

 Colorado this Greenlet is a common summer resident; also in the 

 mountainous regions of New Mexico and Arizona. Its nest is built 

 very similar to that of the Solitary Vireo, V. solitarius, of the Eastern 

 States, but is usually placed higher, and the eggs are indistinguishable. 



* *. Vireo solitarius alticola BREWST. [141, part.'] 



Mountain Solitary Vireo. 



Hab. Southern Alleghanies (Western North Carolina, etc.). 



According to Mr. William Brewster, this bird differs from soli- 

 tarius proper, in being larger, with a stouter bill, and duller, darker, 

 and more uniform coloring above. Throughout the elevated plateau 

 in the southeastern corner of Macon county, North Carolina, he found 

 this new Vireo to be one of the most abundant forest birds, frequent- 

 ing exclusively open oak and chestnut woods, mingling its wild, ring- 



