BIRDS OF NORTH AND MIDDLE AMERICA. 595 
Larus kumlieni Brewster, Bull. Nutt. Orn. Club, viii, no. 4, Oct., 1883, 216 (Cum- 
berland Sound; coll. U. S. Nat. Mus.).—Parx, Auk, i, 1884, 196 (Mohawk 
River, New York, Jan. 28, 1884.)—Barrp, Brewer, and Ripeway, Water 
Birds N. Am., ii, 1884, 219.—Harvis-Brown, Proc. Roy. Phys. Soc. Edinb., 
_ Vili, 1885, 301 (Newgummiloak, 64° 30’ W., 64° N_; crit.) —ReicHENow and 
Scaatow, Journ. fiir Orn., 1885, 453 (reprint of orig. descr.).—AMERICAN 
OrnitHotoaists’ Union, Check List., 1886, and 2d ed., 1895, no. 45; 3d ed., 
1910, p. 37.—SaunpErs, Cat. Birds Brit. Mus., xxv, 1896, 288 (Cumberland 
Sound, June 10).—Scua.Low, Vogel der Arktis, 1904, 144 (synonymy, range, 
etc.).—Bratsuin, Auk, xxii, 1905, 168 (Rockaway Beach, Long Island, 
March 8, 1898).— ALLEN (F.H.), Auk, xxii, 1905, 205 (Boston Harbor, Feb 19; 
crit.); xxv, 1908, 296 (coast of Massachusetts in winter)—Dwieut, Auk, 
xxiii, 1906, 36, pl. 1 (full descriptions; crit.) —Hanrzscu, Journ. fiir Orn., 
1908, 325 (Labrador).—Cookxg, Bull. 292, U.S. Dept. Agric., 1915. 28, fig. 11, 
(range and migrations). : 
Llarus] kumlieni Coves, Key N. Am. Birds, 2d ed., 1884, 742.—Ripeway, Man. 
N. Am. Birds, 1887, 27. 
(Larus] kumlient Saarpe, Hand-list, i, 1899. 142—ForBes and. Rosinson, 
Bull. Liverp. Mus., ii, no. 2, 1899, 58. 
LARUS NELSONI Henshaw. 
NELSON’S GULL. 
Similar in coloration to L. kumlieni, but very much larger. 
Adults in summer (sexes alike).—Head, neck, rump, upper tail- 
coverts, tail, and entire under parts, including axillars and under 
wing-coverts, immaculate pure white; back, scapulars, and wings 
pale gray (between pale and pallid neutral gray, exactly as in L. 
argentatus), the secondaries and five or six proximal primaries 
broadly, but not abruptly, tipped with white; five distal primaries 
marked subterminally with brownish gray as follows: Outermost 
primary with outer web deep brownish gray to within about 76.2 mm. 
of the tip (measured next to shaft), the inner web rather lighter gray 
for about the same distance, but broadly edged with white (the gray 
about 10 mm., the white about 20 mm. wide), this white confluent 
with that of terminal portion; second primary (from outside) tipped 
with white for about 61 mm., the brownish gray subterminal space 
on outer web about 58.5 mm. long next to shaft, but nearly twice as 
long (about 114 mm.) along the edge, the very oblique anterior out- 
line very sharply defined against the pale gray of basal portion; third 
primary tipped with white for about 23 mm., preceded by a brownish 
gray area on outer web about 68.5 mm. long, the inner web being 
pale gray, like basal portion of outer web, but at about 63.5 mm. 
from tip fades into white, the latter, however, interrupted by a sub- 
terminal broad spot of mottled grayish, extending entirely across the 
web; fourth primary tipped with white for about 25.5 mm., the outer 
web then brownish gray for about 30 mm. along shaft and 63.5 mm. 
along edge, the pale gray of the remaining portion perceptibly paler 
next to the brownish gray subterminal space, the inner web having 
