BIRDS OF NORTH AND MIDDLE AMERICA. 657 



shaded or suffused along edges of rectrices with blackish, and crossed 

 by a broad subterminal band of blackish (tliis nearly disappearing 

 on lateral rectrices), and with more or less distinct terminal spots of 

 gray. 



Immature {younger). — Head, neck, chest and most of upper parts 

 sooty grayish brown, the scapulars, interscapulars and wing-coverts 

 with paler margins ; rump uniform grayish brown; upper tail-coverts 

 light gray with indistinct terminal spots of brownish; tail dull slate- 

 black fading in to dull graybasally, especially on inner webs, the lateral 

 rectrices with more than basal half of inner web light gray; under 

 parts deep sooty gray or grayish brown laterally, lighter brownish 

 gray clouded with a more decided brown hue medially, becoming 

 pale brownish gray on anal region; under tail-coverts brownish gray 

 becoming paler on margins; bill, legs and feet black. 



Adult maZe.— Wing, 342-359 (350.3); tail, 143-148 (144.3); ex- 

 l)osed culmen, 40-44.5 (43); greatest depth of bill, 12.7-14 (13.4); 

 tarsus, 52-58.5 (55.8); middle toe, 42.5-44.5 (43. 6). '^ 



Adult female. ~-Wmg, 308.5-343 . (330.1); tail, 129-143 (137.1); 

 exposed culmen, 40-41.5 (40.8); greatest depth of bill, 12.7-14 (13.1); 

 tarsus, 50-55.5 (52.8); middle toe, 39.5-43 (41).^ 



Galapagos Archipelago (Abingdon, Albemarle, Barrington, Bind- 

 loe. Brattle, Champion, Charles, Chatham, Cowley, Crossman, 

 Dapline, Duncan, Hood, Indefatigable, near James, Jervis, Nar- 

 borough, Sc}Tnour and Tower Islands.) 



Larus fulujinosus Gould, Zool. 'Beagle,' iii, 1841, 141 (James Island, Galapagos 

 Archipelago; coll. Brit. Mus.?). — Gray, List Birds Brit. Mus., Anseres, 

 1844, 170, part (Galapagos). — Sundevall, Proc. Zool. Soc. Lond., 1871, 125 

 (Charles and Indefatigable islands, Galapagos). — Sclater and Salvin, Proc. 

 Zool. Soc. Lend., 1871, 573 (raonogr.). — Salvin, Trans. Zool. Soc. Lond., 

 ix, 1876, 505, pi. 87 (Indefatigable, Abingdon, and Charles islands, Galapagos; 

 habits). — Saunders, Proc. Zool. Soc. Lond., 1878, 184 (monogr.); Journ. 

 Linn. Soc, Zool., xiv, 1878, 396 (range); Cat. Birds Brit. Mus., xxv, 1896, 222 

 (.James, Abingdon, and Indefatigable islands). — Ridgway, Proc. U. S. Nat. 

 Mus., xii, 1890, 116 (Indefatigable, James, and Chatham islands); xix, 1896, 

 635 (Charles, Chatham, Barrington, Indefatigable, James, Bindloe, and 

 Abingdon islands; descr.; synonymy; etc.). — Baur, Am. Nat., xxxi, 1897, 

 782 (Albemarle Island), 784 (Jervis Island). — Rothschild and Hartert, 

 Novit. Zool., vi, 1899, 111 (Abingdon Island), 129 (Albemarle Island), 135 

 (Tower Island), 189 (Abingdon, Bindloe, James, Indefatigable, Barrington, 

 Chatham, Charles, Albemarle, Jervis, Tower, and Hood islands; descr. eggs); 

 ix, 1902, 413 (Albemarle, Indefatigable, and Seymour islands; habits), 418 

 (Galapagos). — Snodgrass and Heller, Proc. Wash. Acad. Sci., v, 1904, 237 

 (range, notes, etc.). — Gifford, Proc. Calif. Ac. Sci., 4th ser., ii, pt. i, 1913, 

 42 (Abingdon, Albemarle, Barrington, Bindloe, Brattle, Champion, Charles, 

 Chatham, Crowley, Cro.ssman, Daphne, Duncan, Hood, Indefatigable, near 

 James, Jervis, Narborough, Seymour, and Tower islands, Galapagos; habits, 

 etc.). 



" Five specimens. ^ Eight specimens. 



40017— 10— Bull. 50, pt 8 43 



