40 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



Hxmatopus gala/pagensis Ridgway, Auk, iii, no. 3, July, 1886, 331 (Chatham 

 Island, Galapagos Archipelago; coll'. U. S. Nat. Mus.); Proc. U. S. Nat. Mus.» 

 ix, 1886, 325 (full descr.); xii, 1889, 116, 120, 123, 128 (James, Chatham, and 

 Indefatigable islands); xix, 1896, 621 (Albemarle, Hood. Chatham, Inde- 

 fatigable, James, and Bindloe islands, Galapagos; synonymy; descr.; crit.; 

 measurements). — Sharpe, Cat. Birds Brit. Mus., xxiv, 1896, 116 (Inde- 

 fatigable Island). — Rothschild and Hartert, Novit. Zool., vi, 1899, 186 

 (Albemarle, Hood, Bindloe, James, Indefatigable, Tower, and Chatham 

 islands; crit.); ix, 1902, 412 (Indefatigable, Albemarle, and Seymour islands; 

 descr. young), 418 (Galapagos). — Gifford, Proc. Calif. Acad. Sci., 4th ser., 

 ii, 1913, 47 (Albemarle, Barrington, Bindloe, Charles, Chatham, Gardner- 

 near-Hood, Hood, Indefatigable, James, Narborough, Seymour, and Tower 

 islands; Delano Rock and islets e. of Jervis Island; habits; crit.), 114 

 (measurements). 



H[^matopus] galapage7isis Ridgway, Man. N. Am. Birds, 1887, 182.— Rothschild 

 and Hartert, Novit. Zool., \i, 1899, 203 (Galapagos). 



[Hsematopus] galapagensis Sharpe, Hand-list, i, 1899, 147. — Forbes and Robin- 

 son, Bull. Liverp. Mus. ii, 1899, 63. 



Hsematopus leucopus galapagensis Seebohm, Geog. Distr. Charadr., 1887, pp. xxii, 

 307. 



Hxmatopus galapagoensis Baur, Am. Nat., xxxi, 1897, 783 (Charles and Garduer- 

 near-Hood islands), 784 (Tower Island). 



H^MATOPUS BACHMANI (Audubon). 



BLACK OYSTER-CATCHER. 



Adults in breeding season (sexes alike). — Head, neck, and chest plain 

 blackish gray (nearly dark mouse gray or between that and iron 

 gray), the feathers of chest and breast with a sub terminal U-shaped 

 bar of black; rest of plumage uniform dark sooty brown (nearest clove 

 brown), the primary coverts, primaries, and rectrices darker; "bill 

 vermiUon, fading to yellow on the worn parts toward the end; edges 

 of eyelids vermilion; iris yellow; feet white, sHghtly tinged with 

 flesh color; claws yellowish, toward the end dusky." 



Adults in winder.— Similar to the summer plumage but feathers of 

 abdomen narrowly tipped with white. 



Young. — (Not seen.) 



Downy young. — General color brownish gray, becoming darker on 

 sides of throat and foreneck, the median portion of foreneck, chest, 

 and sides Ughter and clearer (less brownish) gray; a white spot on 

 center of abdomen; occiput with large spots or blotches of black, 

 back with two broad stripes of black, tail blackish, and upper surface 

 in general minutely mottled or freckled with black. 



