376 KORTH AMERICAN BIRDS. 



about twelve feet from the ground. The external depth of this nest was 

 only two and a half inches, the diameter three and a quarter, and its cavity 

 one and three quarters inches deep, and two inches wide at the rim. It was 

 constructed externally of strips of yellow and of gray birch-bark, intermin- 

 gled with bits of wool and dry grasses. The external portion was quite 

 loosely put together, but was lined, in a more compact manner, with dry 

 leaves of the white pine, arranged in layers. Another nest, found in Hing- 

 ham, was but two feet from the ground, on a branch of a hickory sajjling. 

 In its general structure it was tlie same, only diil'ering in shape, being made 

 to conform to its position, and being twice as long as it was broad. It con- 

 tained four young, when found, aVioiit the 10th of June. One nest alone, 

 built on a busli in Lynn, exhibits even an average degree of com])actness in 

 its external structure. Tliis is largely composed of cocoons, which are 

 woven together into a somewhat homogeneous and cloth-like substance. 

 Within, decayed stems of grasses take the place of the usual pine-needles. 



In the summer of 1870 a pair built their nest in a dwarf pear-tree, within 

 a few rods of my house. They were at first very shy and would not permit 

 themselves to be seen at their work, and suspended all labor when any one 

 was occupied near their chosen tree. Soon after the construction of the nest 

 two Cowbird's eggs were deposited, wliich I removed, although the female 

 only laid two of her own belbre she began to sit upon them. By this time 

 she became more familiar, and wouhl not leave lier nest unless I attempted 

 to lay hands upon lier. Slie made no complaints in tlie manner of the 

 White-eyed, nor souglit to attack like tlie Yellow-tliroated, but kept witliin 

 a few feet, and watched me with eager eyes, until I left her. Unfr)rtunately, 

 her nest was pillaged by a Black-Viilled Cuckoo, and 1 was unabk; to observe 

 her feed her young, as I liad hoped to do. 



The eggs are of an oblong-oval sliape, moderately pointed at one end, and 

 of a white ground, less crystalline than in the other species of its kind. They 

 are spotted pretty uniformly over tlie entire egg with dots of dark red and 

 reddish-brown. They are usually five in number. 



Lanivireo solitarius, var. cassini, Baird. 



CASSIN'S VIKEO. 



Vireo cassini, Xantus, Pr. A. N. S. Phil. May, 1858, 117. —Baird, Birds N. Am. 1858, 

 340, pi. btxviii, fig. 1 ; Review Am. B. I, 1865, 347 (sub V. solitaria), Ridgway. 



Sp. Char. Tliin) and fourth quills noarly equal, fifth shorter, .second longer than 

 seventh. Spurious primary very narrow, falcate, acute ; les.s than one third the second quill, 

 and a little more than one fourth the tliird. Above, including edges of wing and tail- 

 feathers, clear olive-green, becoming dusky ashy on the top and sides of head. Beneath 

 fulvous-white, tinged with ill-defined olive-green on the sides (scarcely on the crissum). 

 Two broad bands on the wing-coverts and the outer edges of the innermost sec- 

 ondaries greenish-white ; the outer edge of outer tail-feather, with a broad ring round 



