BIRDS OF NORTH AND MIDDLE AMERICA. 677 
bb. Under parts pale buffy brown; neck conspicuously streaked with yellow; white 
area at base of primaries larger. (South Victoria Land, Weddell Sea, and 
adjacent part of Antarctic Ocean.) 
Megalestris maccormicki (extralimital).¢ 
MEGALESTRIS SKUA (Briinnich). 
SKUA. 
Adults (sexes alike).6—General color dull grayish brown, the inter- 
scapulars, scapulars, and wing-coverts with median streaks of pale 
cinnamon, the feathers of head and neck with similar but narrower 
streaks; under parts somewhat paler than upper’ parts, usually 
more or less suffused with cinnamon, the sides and flanks indistinctly 
striped or broadly streaked with the same; remiges, primary coverts, 
and alula dark grayish brown or dusky, the primaries white basally, 
forming a distinct patch, the concealed basal portion of secondaries 
also white; tail uniform dusky; bill dusky horn color or dull blackish; 
iris dark brown; legs and feet dull blackish. 
Young.—Head, neck, and under parts plain grayish brown, the 
last tinged with cinnamon or dull rusty; upper parts darker grayish 
brown, paler on back and lesser wing-coverts, where indistinctly 
spotted with dull rusty or cinnamon; otherwise essentially like adults, 
but bill, legs, and feet more brownish. 
Downy young.—Plain buffy or cinnamomeous gray, darker (some- 
times more cinnamomeous) on upper parts. 
Adult male—Wing, 400; tail, 52; culmen, 20.5; tarsus, 61-69.8 
(65.2); middle toe, 54.5-63.5 (59.3).¢ 
Adult female —Wing, 406.5; tail, 53.5; culmen, 22.5; tarsus, 69.5; 
middle toe, 64.5.4 
Breeding in Iceland, Faroe Islands, and Shetland Islands; during 
migration occurring off coasts of Greenland (south side of Olrik 
Bay; off Disko Island; Ivigtut), Lady Franklin Island north of 
Hudson Strait, eastern portion of Hudson Strait, Mackenzie (Mac- 
kenzie River), Labrador (Strait of Belle Isle, June 22, 1852), New- 
foundland (Grand Banks), Massachusetts (Georges Bank; Nan- 
tucket Sound, 2 specimens, Oct. 17, 1883; Nantucket Shoals, Oct. 
11, 1883; off Cape Cod, Sept. 10, 1884; Gloucester, July 18, 1878; 
@ Stercorarius maccormicki Saunders, Bull. Brit. Orn. Club, no. xiii, Dec. 30, 1893, 
p. xii; Ibis, 1894, 291 (Possession Island, Victoria Land; coll. Brit. Mus.).— Megales- 
tris maccormickt Saunders, Cat. Birds Brit. Mus., xxv, 1896, 321, pl. 1.—Catharacta 
maccormicki maccormicki Mathews, Birds Australia, ii, pt. 5, Jan. 31, 1913, 496 (South 
Victoria Land, breeding). : 
b There seems to be no seasonal differences of plumage in the Skuas other than those 
dependent on relative freshness or wearing of the feathers. 
¢ Three specimens. 
@ One specimen, from Faroe Islands. A specimen of undetermined sex from the 
Faroes measure as follows: Wing, 410; tail, 52; culmen, 20.5; tarsus, 68.5; middle toe, 
62.5. 
