162 NORTH AMERICAN BIRDS, 



with bright rusty brown or chestnut, the general aspect decidedly rusty .^ 

 Hab. Western North America, breeding north to shores of Norton Sound, 

 Alaska; during migrations occurring more or less plentifully along Atlantic 

 coast 247. E . occidentalis L awr. Western Sandpiper. 



Genus CALIDRIS Cuvier. (Page 149, pi. XLIV., fig. 4.) 



Species. 



Lower parts white, immaculate on belly, sides, flanks, under tail-coverts, axil- 

 lars, and under wing-coverts; greater wing-coverts broadly tipped with white, and 

 inner primaries white at base of outer webs. Summer adult: Above light rusty, 

 spotted with blackish, many of the feathers tipped with whitish ; head, neck, and 

 chest pale rusty, streaked and speckled with dusky. Winter plumage : Above very 

 pale uniform ash-gray, inclining to pearl-gray (the anterior lesser wing-coverts de- 

 cidedly darker), varied only by slightly darker shaft-streaks to the feathei's ; throat 

 and chest, like rest of lower parts, immaculate pure white. Spring plumage : Above 

 light grayish, coarsely spotted with black (streaked on head and neck), and tinged 

 here and there with rusty ; chest speckled with dusky. Young : Above pale gray- 

 ish, spotted with black and whitish, the latter on the tips of the feathers ; chest 

 immaculate white, faintly tinged with dull buff. Length 7.00-8.75, wing 4.70-5.00, 

 culmen .95-1.00, tarsus .90-1.05, middle toe .55-.60. Eggs 1.41 X -91, light oHve- 

 brown, finely spotted or speckled with darker, the markings larger and more 

 blended on larger end. Hah. Nearly cosmopolitan, but breeding only in northern 

 portion of northern hemisphere 248. C. arenaria (Linn.). Sanderling. 



Genus LIMOSA Brisson. (Page 149, pi. XLIX., fig. 1.) 



Species. 



«\ Wings without any white patch. 

 6\ Tail distinctly barred. 



c\ Upper tail-coverts pale cinnamon, barred with black ; axillars and under 

 wing-coverts cinnamon-rufous. 



Prevailing color pale cinnamon or ochraceous, the head and neck 

 streaked, the remaining upper parts irregularly barred and 

 spotted, with brownish dusky. Adult : Breast, sides, and flanks 

 barred with dusky. Young: Breast, sides, and flanks im- 

 maculate, and deeper ochraceous than in adult. Length 16.50- 

 20.50, wing 8.50-9.00, culmen 3.50-5.06, tarsus 2.75-3.00, middle 

 toe about 1.40. Eggs 2.27 X 1-60, pale olive, varying to light 

 grayish buff'y, irregularly and rather sparsely spotted with 

 dark brown and dull purplish gray. Hah. North America in 



1 The eggs of the two species of this genus differ constantly and very decidedly in coloration, as shown hy 

 the above descriptions, which are based on a very large series of each. 



