NORTH AMERICAN BIRDS. 375 



to eighteen feet from the ground. They were composed of the inner 

 bark of this tree interwoven with spider webs, in color resembling the 

 bark of the tree in which they were built, making them difficult to 

 detect. The interior is lined with hair and feathers. The nest resem- 

 bles the average nest of the Black-throated Green Warbler, but is 

 larger. Mr. G. B. Benners met with this species breeding in Comal 

 county, Texas, in April, 1884. The nests were placed in cedars from 

 five to ten feet above the ground and similar in materials and con- 

 struction to those found by Mr. Werner, being neatly and compactly 

 built. The cavity of a typical nest measures about 1.50 to 1.60 across 

 by 1.50 to 2.00 deep. 



The eggs are four, rarely five in number. A. series of six sets, each 

 containing four eggs, is in Mr. Norris' cabinet. Their ground-color is 

 creamy-white, with a slight gloss, speckled and spotted with shades of 

 red and brown that vary from cinnamon-rufous to burnt umber. Some 

 eggs have specks of lilac-gray. Eggs in a set containing the smallest 

 specimens measure .61X.51, .64X.50, .62 x .51, .66X.50; the large.st 

 .68 X .52, .68 X .52, .67 X .49, .67 X .50. The measurements of three 

 eggs taken by Mr. Werner are given as .75 x .57, .']^ x .56, .76 x .58. 



667. Dendroica virens (Gmel.) [107.] 



Black-throated Green 'Warbler. 



Hab. Eastern North America, west to the Great Plains, breeding from Northern United States north- 

 ward. In winter, south through Eastern Mexico and Central America to Panama; also to the West Indies. 

 Casual in Greenland. 



The Black-throated Green Warbler breeds from the Northern 

 United States northward — wherever there are tracts of coniferous trees 

 the bird is almost sure to be found during the breeding season, which 

 is generally in the latter part of May or in June. Throughout the pine 

 regions of New England it is an abundant species. Breeds in New- 

 York, Michigan, and it is also stated to breed in Northern Illinois. A 

 few pairs are said to remain during the summer months in Northern 

 Ohio. The nest of this Warbler is placed in the fork of a horizontal 

 bough of a coniferous tree, usually at a considerable height — thirty to 

 fifty feet, but frequently as low down as fifteen or even five feet above 

 the ground. Mr. L. C. Holmes, of Standish, Maine, states that all the 

 nests he has found were in low, scrubby firs. The typical nest is a 

 compact, well-woven fabric made of thin bark strips, twigs, dry grasses, 

 wool and feathers, lined with hair and vegetable down. 



The eggs are four in number, and have a ground-color which 

 ranges from white to buffy or creamy-white. The markings are 

 specks and spots of cinnamon-rufous, chestnut, and lilac-gray, forming 

 indistinct wreaths about the larger ends. This description is taken 



