72 NESTS AND EGGS OF N. A. BIRDS. 



140. LANIVIREO FLAVIFRONS. 



YELLOW-THROATED VIREO. 



This Vireo is found throughout the Eastern United States. 

 The nest is a pendant structure, and hemispherical in 

 shape. It may always be readily distinguished from 

 any other nest of this family by the profusion of lichens and mosses 

 with which its outer portion is adorned and covered, giving it the 

 appearance of a large moss-covered knot. 



The eggs of this species vary from .95 to .88 of an inch in length, 

 and irom .65 to .60 in breadth. Their ground-color is white, 

 often with a very perceptible tint of roseate when fresh. In this 

 respect they differ in a very marked manner from the eggs of any 

 other of this genius,. except, perhaps, the barbatula^ and may thus 

 always be very easily recognized. They are more or less boldly 

 marked with blotches of a dark roseate-brown, also peculiar to the 

 eggs of this species, though varying greatly in their size and depth 

 of color. 



141. LANIVIREO SOLITARIUS. 



BLUE-HEADED VIREO. 



Habitat, United States from Atlantic to Pacific. 



Seven nests of this species, found in Lynn and Hingham, Mass., 

 exhibit peculiarities of structure substantially identical. In com- 

 parison with the nests of other Vireos, they are all loosely con- 

 structed, and seem to be not so securely fastened to the twigs, from 

 which they are suspended. One of these nests, typical of the gen- 

 eral character, obtained in Lynn, May 27, 1859, by Mr. Geerge O. 

 Welch, was suspended from the branches of a young oak, 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 deep, and two inches wide. at the 

 rim. It was constructed externilly of yellow and of gray birch-bark, 

 intermingled 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 

 ayers. 



