BIRDS OF NORTH AND MIDDLE AMERICA. 519 
[Haliplana] fuliginosa Gunviacn, Journ. fiir Orn., 1861, 346 (Cuba). 
Sterna (Haliplana) fuliginosa Cours, Birds Northwest, 1874, 698, part (monogr.). 
Onychoprion fuliginosus Scuater, Proc. Zool. Soc. Lond., 1856, 144 (Ascension 
Island).—Nzwron (A.and E.), Ibis, 1859, 371 (St. Croix, Lesser Antilles).— 
Cassin, Proc. Acad. Nat. Sci. Phila., 1860, 379 (St. Thomas, Greater 
Antilles)—Sconater and Satvin, Proc. Zool. Soc. Lond., 1871, 572, part 
(monogr.).—GieLiouI, Ibis, 1881, 218 (Piedmont, Italy); Avifauna Ital., 
1886, 415.—ZeLepOn, Cat. Aves de Costa Rica, 1882, 36. : 
[Onychoprion] fuliginosus Sctater and Savin, Nom. Av. Neotr., 1873, 147, part. 
[Sterna] spadicea GmEtin, Syst. Nat., i, pt. ii, 1789, 610 (Cayenne; founded on 
the Brown Tern Latham Syn., iii, 2, 359, no, 12).—LatHam, Index Om., 
ii, 1790, 807 (Cayenne). 
Sterna spadicea View.ot, Nouv. Dict. d’Hist. Nat., xxxii, 1819, 175. 
Anous? spadicea StePHENS, Shaw’s Gen. Zool., xiii, pt. 1, 1826, 143. 
Anous l’herminieri Lusson, Descr. Mam. et Ois., 1847, 255 (Antilles; young). 
STERNA FUSCATA CRISSALIS (Lawrence). 
SOCORRO SOOTY TERN. 
Similar to S. f. fuscata but underparts much more strongly tinged 
with gray, this gray tinge extending forward to chest, though deeper 
posteriorly; similar in coloration to 8. f. oahuensis* but lateral rectrices 
less elongated and with inner webs more extensively dusky terminally. 
Adult male.—Wing, 280-292 (286); tail, 135-170 (151.2); exposed 
culmen, 39.5-43.5 (41.4); tarsus, 21-23 (21.7); middle toe, 19.5-20.5 
(20.2).° 
Adult female.—Wing, 271-298 (285.2); tail, 124-161.5 (152.9) 
exposed culmen, 41-43.5 (41.9); tarsus, 21-23 (22); middle toe, 
20-21.5 (20.7).° 
Pacific coast of Mexico and Central America, from Sinaloa (Mazat- 
lan) and Tepic (Tres Marias Islands; Isabella Island) to Panama 
(Panamé; Santiago de Verdgua) and southward to Clipperton Island 
and Galapagos Archipelago (Crossman, Culpepper, and Wenman 
islands); breeding on Isabella Island, off Tepic, Socorro Island and 
Oneal Rock, Revillagigedo group, Clipperton Island, and Culpepper 
Island. 
(?) Sterna luctuosa Puiiepr and LanpBEcK, Wiegmann’s Archiv fiir Naturg., 
1866, i, 126 (Valdivia, Chile). 
Haliplana fuliginosa (not Sterna fuliginosa Gmelin) Savin, Proc. Zool. Soc. Lond., 
1867, 161 (Santiago de Veragua, Panama). 
Sterna fuliginosa (not of Gmelin) ANtHony, Auk, xv, 1898, 316 (Socorro Island, 
breeding).—Rotuscuitp and Hartert, Novit. Zool., vi, 1899, 89 (Culpepper 
Island, Galapagos), 107 (at sea north of. Culpepper Island), 191 (Culpepper and 
Wenman islands, crit.); ix, 1902, 413 (Culpepper Island, breeding; Clipper- 
ton Island), 418 (Culpepper Island, breeding; Wenman Island).—Snoparass 
and Heuer, Proc. Wash. Acad. Sci., iv, 1902, 505 (Clipperton Island; descr.; 
measurements; habits; descr. eggs).—Sanvin and Gopman, Biol. Centr.- 
Am., Aves, iii, 1903, 409, part (Socorro, Isabella, and Tres Marias islands and 
Mazatlan, w. Mexico; Panama and Santiago de Veragua, Panama).—Girrorp, 
@See p. 488. b Four specimens. ¢ Six specimens, 
