430 Field Museum of Natural History — Zoology, Vol. IX. 



boygan on the Lake shore, but is now almost entirely absent, except 

 a limited number during migrations (Birds of Wisconsin, 1903, p. 54). 

 The nest is merely a depression in the sand. The eggs are three 

 or four in number, cream white, speckled with chocolate brown. 

 They measure about 1.25 x .96 inches. The subspecies A. m. cir- 

 cumcincta is no longer recognized as separable. 



Family APHRIZIDtE. Surf Birds and 



Turnstones. 



Three of the four known species are found in North America, but 

 only one is known to occur in Illinois. They are plover-like in 

 appearance, frequenting the beaches and sand flats in company with 

 other waders. The name Turnstone is supposed to be derived from the 

 habit of turning over small stones while searching for food. 



Subfamily ARENARIINtE. Turnstones. 

 Genus ARENARIA Brisson. 



139. Arenaria interpres morinella (Linn.). 

 Turnstone. 



Arenaria interpres (Linn.), A. O. U. Check List, 1895, p. 103. 



Local names: Calico-back. Brant Bird. 



Dist.: Northern North America, chiefly east of the Mackenzie 

 River basin, breeding in high latitudes; south to Patagonia in winter; 

 rare on the Pacific coast. 



Adult in summer: General upper parts, mottled and variegated 

 with black, white, rufous and tawny; throat and breast, black and 

 white; rest of under parts, white; tail, with subterminal band of 

 black, tipped with white. 



Adult in winter: Above, light, streaked and dashed with dark 

 brown; an imperfect band of dark brown on the 

 jugulum; chin and upper part of the throat, white; 

 sides of breast, like the back; rest of the under parts, 

 white; a distinct white band on the wing; rump, 

 white, but with a broad patch of black on the 

 upper tail coverts; tail, dark brown, the tips and basal half of the 

 inner feathers, and nearly two-thirds of the outer feathers, white; 

 legs, reddish orange; bill, black. 



