WARBLERS. 53 



The eggs measure .70 by .55 of an inch, have a pinkish-white 

 ground, blotched with purple and brown of various shades and 

 tints. They are disposed chiefly about the larger end, usually in a 

 ring. The eggs are oval in shape and slightly pointed at one end." 



91. PERISSOGLOSSA CARBONATA. 



CARBONATED WARBLER. ** 



92. PEUCEDRAMUS OLIVACEUS. 



OLIVE-HEADED WARBLER. ** 



93. DENDRCECA ESTIVA. 



SUMMER YELLOW BIRD; YELLOW WARBLER. 



This Warbler is found throughout the entire continent of North 

 America. In Eastern United States it begins building about the mid- 

 dle of May. This, however, is governed by the advancement of the sea- 

 son. The nest is usually placed in low bushes, three or four feet 

 from the ground Sometimes it is placed at heights ranging from 

 ten to forty feet, in large trees, but their favorite places are hedges 

 and low shrubs. It is usually fastened to several twigs with a re- 

 markable neatness and skill. It is composed of hempen fibres of 

 plants, fine strips of bark, slender stems of plants and leaves, and 

 down of the willow catkins. It is lined with soft, fine grasses, 

 hair, feathers, and other warm materials. The intrusive Cow-bird 

 makes the nest of this Warbler a favorite receptacle for depositing 

 her egg. The nest usually measures two and one-half to three 

 inches in height by three in diameter. 



The eggs, usually four or five in number have a light green 

 ground-color, with dots and blotches of light purple, darker pur- 

 ple, and shades of brown and lilac. They measure from .61 to .70 

 in length and from .49 to .52 in breadth. 



94. DENDRCECA C^RULESCENS. 



BLACK-THROATED BLUE WARBLER. 



This elegant bird is found throughout Eastern North America. 



"In the middle States, where the species is migratory, I used to 

 find it common every spring and fall, during the migrations ; 

 oftenest in low and tangled woods, but also in open forest in com- 

 pany with virens and others, I am not aware of any specified in- 



