540 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 
Sterna grisea Horsrietp, Trans. Linn. Soc., xiii, 1821, 199 (Java; type in coll. 
Brit. Mus.).—StTePHENs, in Shaw’s Gen. Zool., xiii, pt. 1, 1825, 159. 
Hydrochelidon grisea Born, Isis, 1844, 184.—Gray, List Birds Brit. Mus., Anseres, 
1844, 180. 
H{ydrochelidon] grisea Gray, Gen. Birds, iii, 1846, 660. 
Hydrochelidon leucoptera grisea MatHews, Birds Australia, ii, pt. 3, Sept. 20, 
1912, 312 (China to n. Australia; New Zealand); List of the Birds of Australia, 
1913, 44. 
Hydrochelidon leucourus SexFrertirz and Breum, Isis, 1833, 985. 
Hydrochelidon nigra (not Sterna nigra Linnezus) Gray, List Birds Brit. Mus., 
Anseres, 1844, 180; Cat. Brit. Birds, 1863, 243.—Buiytu, Cat. Birds Mus. 
Asiat. Soc., 1849, 291.—Jerpon, Birds India, iii, 1864, App., 875.—DzEcLanp 
and GERBE, Orn. Eur., ii, 1867, 466.—Locuz, Expl. Sci. Algér., Ois., 1867, 
207.—Satvaport, Faun. Ital., Ucc., 1871, 274; Uce. Borneo, 1874, 372.— 
SuELLey, Birds Egypt, 1872, 301; Ibis, 1888, 306 (Lamu, e. Africa).— 
Gurney, in Andersson’s Birds Damara-Land, 1872, 363.—Hrveuin, Orn. 
N. O.-Afr., Bd. ii, pt. 2, 1878, 1447.—Covgs, Birds Northwest, 1874, 708.— 
Wa.pen, Trans. Zool. Soc. Lond., viii, 1874, 103 (Celebes).—PrJEVALsKy, 
Rowley’s Orn. Misc., iii, 1878, 145 (Tsaidemin Lakeand basin of Lake Hauka, 
Mongolia, breeding).—Finscu, Verh. z.-b. Ges. Wien, xxix, 1879, 280 (Chinese 
Altai, 5,000 ft.).—Bozav, Journ. fiir Orn., 1882, 342 (Dauria).—Buasius (W.), 
Verh. z.-b. Ges. Wien, xxxiii, 1883, 73 (s. e. Borneo); Ornis, 1888, 633 
(Great Sanghir Island).—VorpErman, Nat. Tijdschr. Nederl. Ind., ii, 1892, 
413 (Java). ; 
H[ydrochelidon] nigra Gray, Gen. Birds, iii, 1846, 660. 
[Hydrochelidon] nigra Bonararte, Compt. Rend., xlii, 1856, 773.—Gray, Hand- 
List, iii, 1871, 121, no. 11070. - 
Sterna nigra ScHLecEt, Mus. Pays-Bas, vi, no. 24 (Sternae), 1864, 31_—Hotps- 
wortH, Proc. Zool Soc. Lond., 1872, 481 (Ceylon).—-LzaerE, Journ. Asiat. 
Soc. Bengal, 1874, 58 (Ceylon).—Bianrorp, East. Persia, ii, 1876, 290.— 
Buastus and Neprxorn, Verz. z.-b. Ges. Wien, xxxii, 1882, 432 (Amboina; 
see Ibis, 1883, 212). 
Hydrochelidon niger SzvERTSOV, Turkestan. Jevotnie, 1873, 70 (Turkestan, up 
to 10,000 ft.). 
Hydrochelidon hybridus (not Sterna hybrida Pallas) Taczanowsk1, Journ. fiir Orn., 
1878, 111; 1874, 337 (Dauria; see Bull. Soc. Zool. France, 1876, 262). 
Hydrochelidon subleucoptera Breum, Vogelf., 1855, 350 (n. e. Africa, rare in s. 
Europe). 
Hydr[ochelidon] subleucoptera BrEuM, Naumannia, 1855, 295. 
Hydrochelidon javanica (not Sterna javanica Horsfield) Swinnoe, Ibis, 1860, 68; 
1861, 345 (n. China). 
Genus PHATUSA Wagler. 
Phaetusa WaGuER, Isis, xxv, 1832, 1224. (Type, by original designation and 
monotypy, Sterna magnirostris Lichtenstein=S. chloripoda Vieillot.) 
Phaethusa (emendation ) Acassiz, Nomencl. Zool., Index, 1846, 283. 
Photusa (emendation) BonaParte, Compt. Rend., xlii, 1856, 772. 
Thalassites Swainson, Classif. Birds, ii, 1837, 373. (Type, by monotypy, Sterna 
magnirostris Lichtenstein =S. chloripoda Vieillot.) 
Large Sternide (wing 266-312 mm.) with nostril far anterior to 
latero-frontal antia, anterior line of frontal feathering not indented 
at base of culmen, and tail much less than half as long as wing; 
forked for only about one-fourth its length. 
