are numerous and are often confluent and occasionally obscured by surface marks. Size, .59 x .74. No. 3. 

 Ground-color white. Surface-marks are very faint burnt-sienna, and consist of blotches, spots, and speckles 

 and occasionally, irregularly short lines. The deep shell-marks are twice as plentiful as surface marks, 

 they are pale lavender and are chiefly in a wreath about the base, while the surface marks are distrib- 

 uted for the most part over the pointed half of the shell. Size, .54 x .71. From the above descriptions 

 the reader will see that there is considerable variation in the amount and pattern of markings. 



DIFFERENTIAL POINTS : 



The eggs of the Yellow-winged Sparrow are easily recognized from the eggs of other Sparrows which 

 build in a similar locality and position, by their size, ground-color, and color and arrangement of the 

 markings. The eggs of the Swamp Sparrow, the Song Sparrow, the Bay-winged Banting, and the Lark 

 Finch arc so entirely different from those of the species under consideration, there is but the slightest 

 chance of confusion. There ai-e eggs which resemble them closely, but the nests are entirely dissimilar 

 in location, position, and construction. See Table. 



REMARKS : 



Fig. 4, Plate LX, represents three eggs of the Yellow-winged Sparrow, they show the common sizes, 

 shapes, ground-color, and pattern and color of the markings. The location, position, and construction of 

 the nest is so similar to some of the nests upon the ground already illustrated that a drawing of it is 

 omitted. 



On page 555, Vol. 1, "North American Birds," Mr. Brewer, writing of the eggs of this species, says: 

 '.'Wilson and Nuttall describe the eggs as grayish-white, sprinkled with brown. Audubon says they are 

 dingy-white, sprinkled with brown spots. This is not accurate. The ground-color is a clear crystalline 

 white, beautifully dashed and marbled with bold markings of an almost golden brown. These spots vary 

 in size, are often quite large, and occasionally make a corona about the larger end. The eggs are of a 

 rounded oval, almost spherical, shape, measuring .75 x .63 of an inch." Page 127, "Birds of Eastern North 

 America," Mr. C. J. Maynard says: "Eggs four or five in number, rather oval in form, ashy-white in color, 

 spotted and blotched with reddish-brown and lilac, more thickly on the larger end." Mr. H. D. Minot, 

 in "Land and Game Birds of New England," describing the eggs under consideration, writes: " Four or 

 five eggs are then laid, averaging .78 x .60 of an inch, and normally are white, with a wreath of blended 

 reddish-brown and obscure lilac spots about the greater end, and a few scattered spots of the former color 

 elsewhere. In some cases the markings cover the greater end, so that there is no distinct ring." From 

 the above it will be seen that, making due allowance for errors of description, there is considerable 

 variation in the eggs of this Sparrow. 



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