686 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 
* 485; 1st Resoc. Avif. Ital., 1889, 650; 2d Resoc., 1890, 661.—TacZANOWSKI, 
Orn. du Pérou, iii, 1886, 458.—Sanvaporr, Ucc. Ital., 1887, 290.—Mac- 
Fartane, Ibis, 1887, 206 (Callao Bay, Peru).—Tart, Ibis, 1887, 396 (Portu- 
gal).—Harviz-Brown and Buckury, Faun. Outer Hebrides, 1888, 151.— 
REIcHENOW, Syst. Verz. Vég. Deutschl., 1889, 64. STEVENSON and Soura- 
WELL, Birds Norfolk, iii, 1890, 398—Buckrey and Harvie-Brown, 
Fauna Orkneys, 1891, 237; Fauna Argyll and Inner Hebrides, 1892, 194.— 
Hartert, Ibis, 1892, 591 (e. Prussia).—Insy, Orn. Straits Gibralt., 2d ed., 
1895, 302.—Scuatow, Journ. fiir Orn., 1895, 464 (w. Greenland).—P#arson, 
Ibis, 1896, 219 (Kolguev, Russia), 224 (Novaya Zemlya; habits); 1898, 203 
(Waigats, Novaya Zemlya, and Lutke Land).—Poruam, Ibis, 1897, 107 
(Yenesai River and Golchika, Siberia; descr. nest and eggs); 1898, 519 (Doo- 
dinka, Yenesai River).—Trevor-Batryve, Ibis, 1897, 593 (Spitzbergen).— 
GirrorD, Proc. Calif. Ac. Sci., 4th ser., pt. i, 1913, 46 (Albemarle Island, 
Galapagos, Dec. 15, 1897).—Maruzws, Birds Australia, ii, 1913, pl. [123] 
facing p. 498. : . 
[Stercorarius] pomatorhinus Cours, Key N. Am. Birds, 1872, 309.—Suanrpe, 
Hand-list, i, 1899, 144—Forses and Rosinson, Bull. Liverp. Mus., ii, 
no. 2, 1899, 59. . 
S[tercorarius] pomatorhinus Nuuson, Bull. Essex Inst., viii, 1876, 145 (Lake Michi- 
gan, near Chicago, Oct. 9, 1876, and near Evanston, Illinois).—Covss, Key N. 
Am. Birds, 2d ed., 1884, 735. 4 
[Coprotheres] pomatorhinus Huns and Rercuenow, Nom. Mus. Hein. Orn., 1890, 
360. 
[Catarractes parasita, var.] camtschatica Patuas, Zoogr. Rosso-Asiat., ii, 1826, 312, 
Coprotheres pomarinus camtschatica MATHEWS, Birds Australia, ii, pt. 5, Jan. 31, 
1913, 498 (Alaska to Siberia). 
L{estris] sphaeriuros Bruun, Isis, 1830, 993 (nomen nudum). 
Lestris sphaeriuros Bream, Vég. Deutschl., 1831, 718; Naumannia, 1855, 294; 
Vogelf., 1855, 336. 
L{estris] striatus Eyton, Cat. Brit. Birds, 1836, 51 (ex Stercorarius striatus Brisson, 
Orn., vi, 152, pl. 18, fig. 2, =young). 
Stercorarius striatus OLPHE-GALLIARD, Orn. Eur. Occid., fase. x, 1886, 7. 
Stercorarius catarractes (not Lestris catarracies Iiger) Wrieut, Ibis, 1864, 150 
(Malta). 
[Lestris pomarinus] a. fuscus BONAPARTE, Consp. Gen. Av., ii, 1857, 208. 
Genus STERCORARIUS Brisson. 
Stercorarius Brisson, Orn:, vi, 1760, 149. (Type; by tautonymy, [Stercorarius] 
stercorarius Brisson=Larus parasiticus Linneus.) 
Lestris [utiezR, Prodromus Orn., 1811, 272. (Type, Larus parasiticus Linneus.) 
Praedairiz Visu.or, Analyse, 1816, 65. (Type, Labe Buffon=Larus parasiticus 
Linnzeus. ) 
Oceanus (not of Montfort, 1808) Kocu, Syst. baier. Zool., 1816, 880. (Type, Larus 
parasiticus Linneus.) ; : 
Alalolestris Maruews, Birds Australia, ii, pt. 5, Jan. 31, 1913, 500. (Type, by 
original designation, Stercorarius longicaudus Vieillot.) 
Small Stercorariide (wing 295-342 mm.) with elongated middle 
pair of rectrices tapering and pointed terminally, not twisted, and 
depth of bill at base not greater than its width at same point. 
Bill relatively small, much shorter than head, the exposed culmen 
decidedly shorter than middle toe without claw, its depth at base 
