536 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 
Hydrochelidon fissipes Cours, Proc. Ac. Nat. Sci. Phila., 1862, 554 (monogr.); 
1866, 99 (Colorado River, Arizona); 1871, 46 (Fort Macon, North Carolina, in 
migration); Ibis, 1864, 391 (Southern Water Cay, Brit. Honduras); Check 
List, 1873, no. 575.—Satvin, Ibis, 1866, 205 (Coban, Guatemala),—Law- 
rENcE, Ann. Lyc. N. Y., viii, 1867, 299 (vicinity New York City); Mem. 
Bost. Soc. N. H., ii, 1874, 318 (Mazatlan, Sinaloa, winter); Bull. U.S. Nat. 
Mus., no. 4, 1876, 52 (San Mateo, Oaxaca),—Da.n and Bannister, Trans, 
Chicago Ac. Sci., i, 1869, 307 (Fort Yukon, Alaska, breeding),—Sciater and 
Satvin, Proc. Zool. Soc. Lond., 1871,.573 (monogr).—Gunp.acg, Journ. fir 
Orn., 1874, 314 (Porto Rico); 1875, 393 (Cuba); 1878, 163, 191 (Porto Rico),— 
“Hensuaw, Ann. Lyc. N. Y., xi, 1875, 13 (marshes of Great Salt Lake, Utah, 
breeding),—Brewsrter, Bull. Nutt. Orn. Club, iii, 1878, 190 (Nantucket 
Island, Massachusetts, Aug., 1878, numerous).—ZeLEDON, Cat. Aves de 
Costa Rica, 1882, 36. 
[Hydrochelidon] fissipes Couns, Key N. Am. Birds, 1872, 323—Scnater and 
Satvin, Nom. Av. Neotr., 1873, 148. 
[Hydrochelidon lariformis] 8. (American references.) Couzs, Birds Northwest, 
1874, 705 (monogr.; not Rallus lariformis Linnzeus, 1758). 
Hydrochelidon lariformis Hensuaw, Zool. Expl. W. of 100th Merid., 1875, 487.— 
LzBaron, Forest and Stream, 1876, 372 (Ipswich Bay, Massachusetts, 
Aug. 25, 1875).—Srruezrs, Bull, U. S. Nat, Mus, no. 7, 1877, 27 (Mita Point, 
Sinaloa).—Roserts, Bull. Nutt. Orn. Club, ii, 1877, 34-36 (near Minneapolis, 
Minnesota; breeding habits).—Ripaway, Orn. Fortieth Parallel, 1877, 640 
(Sacramento, California, breeding).—Covzs, Bull. U. S. Geol. and Geog. 
Surv. Terr., iv, 1878, 656 (Pembina and Souris River, North Dakota, breeding; 
habits); Check List, 2d ed., 1882, no. 806.—Brown (N. C.), Bull. Nutt. Orn. 
Club, iv, 1879, 108 (Scarborough, Maine, in fall). 
Hydrochelidon) lariformis Netson, Bull. Essex Inst., viii, 1876, 149, 150 (n. e. 
Illinois, abundant summer resident).—Covszs, Key N. Am, Birds, 2d ed. 
1884, 770. 
[Hydrochelidon] lariformis Cory, List Birds West Ind., revised ed., 1886, 34. 
Sterna melanops RaFinesquE, Kentucky Gazette, i, no. 8, Feb. 21, 1822, p. 3, 
col, 5, in text (near Harrodsburg, Kentucky). 
Chlidonias melanops RaFINEsQuE, Kentucky Gazette, i, no. 8, Feb. 21, 1822, 
p. 3. col. 5, in text. 
HYDROCHELIDON LEUCOPTERA (Temminck).¢ 
WHITE-WINGED BLACK TERN. 
Much like ZH. nigra surinamensis, but lower rump and upper tail- 
coverts white (tail also white or very pale gray), and adults with 
more anterior lesser wing-coverts white and feet vermilion or coral red. 
Adults in summer (sexes alike).—Head, neck, and under parts, 
except under tail-coverts and anal region, uniform sooty blackish 
(varying from brownish sooty black to dusky purple-gray); back, 
@ The far eastern birds of this species have been separated subspecifically.—Sterna 
grisea Horsfield, Trans. Linn. Soc., xiii, 1820, 190 (Java; type now in coll. Brit. Mus.).— 
Hydrochelidon grisea Boie, Isis, 1844, 184.—Hydrochelidon leucoptera grisea Mathews, 
Birds Australia, ii, pt. 3, Sept. 20, 1912, 312 (China to northern Australia; New Zea- 
land?); Thayer and Bangs, Auk, xxxiii, 1916, 44 (Saghalin Island; crit.). Messrs. 
Thayer and Bangs, however, in their series from Saghalin Island, were unable to 
appreciate any differences from European birds. The small series examined by me 
is not sufficient to justify expressing an opinion in the case. 
