594 BULLETIN 50, LT^XITED STATES NATIONAL MUSEUM. 



four outer primaries with the outer web brownish gray subterminally, 

 this sometimes confluent with the band on inner web but sometimes 

 separated from the subterminal band by a white area: inner webs 

 of primaries pure white (except for the subterminal brownish-gray 

 band, when present), passing into dehcate pale gray basally, the 

 outermost sometimes with a narrow subterminal stripe of gray on 

 inner web along shaft; bill yellow, the mandible with a lateral sub- 

 terminal spot of red; iris cream color;'* naked orbital ring reddish 

 purple ; °' legs and feet flesh color. ** 



Young. — General color brownish gray or grayish brown, this 

 nearly uniform on under parts, the upper parts mottled with dull white 

 and indistinctly mottled and irregularly barred with darker gray, 

 the head and neck paler and very indistinctly streaked; primaries 

 deep brownish gray, darker on outer webs; tail nearly uniform 

 brownish gray, finely mottled basally and on outermost rectrices 

 with whitish, the tail-coverts brownish gray or grayish brown more 

 coarseW mottled or blotched with whitish; bill blackish, paler (flesh 

 color in life?) basally; iris gray; legs and feet dull flesh color (in 

 life). 



Adult male. — Wing, 416; tail, 166; exposed culmen, 47; tarsus, 

 56; middle toe, 52.5.^ 



Adult female . — Wing, 393; tail, 161; exposed culmen, 43; tarsus, 

 53; middle toe. 49.5.'^ 



Breeding from Cumberland Sound to Ruprecht Island, on eastern 

 side of Ellesmere Land, in Lat. 79° N.; migrating southward to 

 Nova Scotia (Bay of Fuiidy, about November 1, 1881); New Bruns- 

 wick (Grand Menan, about January 21, 1883), Prince Edward 

 Island (October 7, 1905), Quebec (Tadousac, probably spring of 

 1901), and New York (mouth of Mohawk River, January 28,1884; 

 Rockaway Beach, Long Island, March 8, 1898). 



(?) [Larus (Laroides)] chalcopterus (not Larus chalcoplerus lichtenstein, 1854) 



Bruch, Joiirn. fiir Orn., 1855, 282, part (Greenland). 

 (?) [Leucus] chakopterusBoNAJ'ARTE, Compt. Rend., xlii, 1856, 770, part (Green- 

 land); Consp. Av., ii, 1857, 216, part (Greenland). 

 (?) Larus chalcopterus Reinhardt, Ibis, 1861, 17 (Greenland). 

 Larus glaucescens (not of Naumann, 1840) Kumljen, Bull. U. S. Nat. Mus., no. 



15, 1879, 98 (Cumberland Sound; Baffin Land). — Brewster, Bull. Nutt. 



Orn. Club, viii, 1883. 125 (Bay of P\indy, Nov. 1, 1881).— Merrill, Bull. 



Nutt. Orn. Club, viii, 1883, 125 (Grand Menan, New Brunswick, Jan., 1883). 

 (?) Larus leucopterus (not of Faber, 1822) Bangs, Bull. Nutt. Orn. Club, 



vi, 1881, 121 (off Boston, Massachusetts).— Cory, Bull. Nutt. Orn. 



Club, vii, 1882, 60 (near Boston). — Brewster, Bull. Nutt. Orn. Club, viii, 



1883, 125 (West Sullivan, Maine, Jan., 1883). 

 Larus leucopterus (or kumlieni) Braislin, Auk, xvi, 1899, 190 (Rockaway 



Beach, Long Island, March 8, 1898). 



o In life, according to Kumlien. c One specimen. 



^ One specimen (type of the species). 



