1. HTDROCHELIDON. 21 



Orn. ii. p. 282 (1834) ; Auduh. Orn. Bioyr. iii. p. 535 (1835) ; id. 



op. cit. V. p. 642 (1839); id. Syn. p. 320 (1839) ; id. B. Am. 8vo 



eel. vii. p. 116, pi. 436 (1844) ; Gimud, B. Long Isl. p. 352 (1844) ; 



Lembeye, Av. Cuba, p. 124(1850); A. ^ E. Newton, Kandb. 



Jamaica, p. 117 (1881). 

 Anoiis plumbea, Steph. in Shale's Gen. Zool. xiii. pt. 1, p. 142 (1825) 



(ex Wilson). 

 Hydrochelidon nigrum, Bp. Co77ip. List B. Eur. S/- N. Am. p. 61 



(1838) ; Gosse, B. Jamaica, p. 437 (1837). 

 Sterna exilis, Tschudi, ^je^wi. ^rcA. 1843,i. p. 389, no. 19; Tschudi 



S^ Cab. Faun. Peruan., Aves, p 53 & p. 306 (type, in winter: 



plumage, in Neuchatel Mus. examined, H. S.). 

 Hydrochelidon plumbea, Boie, Isis, 1844, p. 184 ; Gray, Gen. B. iii. 



p. 6G0 (1846) ; Baird, Cass. S,- Lawr. B. N. Am. p. 864 (1858) : 



Lawr. Ann. Lye. N. Y. vii. p. 479 (1862: New Granada); 



Blakiston, Ibis, 1862, p. 10 (Saskatchewan); Sclater, P. Z. S. 



1864, p. 179 (Mexico City); Scl. ^ Salv. t. c. p. 373 (Brit. 



Honduras) ; Pelz. Eeis. Kovara, Voy. p. 155 (1865 : Chili) ; 



Dresser, Ibis, 1866, p. 45 (Texas) ; Snoio, B. Katisas, p. 12 (1873). 

 Hydrochelidon surinamensis, Bp. C. R. xlii. p. 773 (1856) ; Gray, 



Hand-l. B. iii. p. 122 (1871). 

 iSterna frenata, Salvin, Ibis, 1860, p. 278 ; cf. Ibis, 1866, p. 205 



(Coban). 

 Hydrochelidon fissipes, Coues, Pr. Phil. Ac. 1862, p. 654 ; id. Ibis, 



1864, p. 391 (British Honduras) ; Lawr. Ann. Lye. N. Y. viii. 



p. 299 (1865) ; Salvin, Ibis, 1866, p. 205 (Coban) ; Dall ^- Bann. 



Tr. Chic. Acad. i. p. 307 (1869 : Alaska) ; Scl. S, Salv. P. Z. S. 



1871, p. 573 (revision) ; Lawr. Mem. Boston Sac. N. H. ii. p. 318 



(1874: Mazatlan); Hensh. Ann. Lye. N. Y. xi. p. 13 (1874: 



Utah) ; Gimdl. Orn. Cuba, p. 310 (1876) ; Latvr. Bull. U.S. Nat. 



3Lts. iv. p. 52 (1877 : Tehuautepec) ; Zeledon, Cat.Av. Costa Rica, 



p. 36 (1882). 

 .Sterna fissipes, Ridgic. Ann. Lye. N. Y. x. p. 392 (1874 : Illinois). 

 Hydrochelidon lariformis, Coues, B. N.-West, p. 704' (1874) ; 



'm7ish. Rep. Zool. Expl. 100th Merid. p. 487 (1875) ; Streets, Bull. 



U.S. Nat. Mus. vii. p. 27 (1877: Sinaloa, Mexico) ; Ridgiv. Rtp. 



Surv. iOtk Par. p. 640 (1877 : Sacramento, Cal.) ; Coues, Bull. 



U.S. Geol. Surv. iv. p. 656 (1878 : Pembina) ; id. Check-list 



N. Amer. B. p. 124 (1882) ; id. Key N. Amer. B. 2nd ed. p. 770 



(1884). 

 " Sterna cassia, Linn.^'' Gundlach, J. f. O. 1875, p. 393 [? error for 



S. nsevia]. 

 Hydrochelidon nigra (pt.), Saunders, P. Z. S. 1876, p. 642 (revision). 

 Hydrochelidon lariformis surinamensis, Ridgio. Bull. U.S. Nat. Mus. 



no. 21, p. 53 (1881). 

 Hvdi'ochelidou nigra surinamensis, A. O. U. Check-list N. Amer. B. 



p. 96 (1882) ; Baird, Brew. Sf Ridgic. Water-Birds N. Amer. ii. 



p. 318 (1884); Ferrari- Perez, Pr. U.S. Nat. Mus. ix. p. 179 



(1886 : Puebla) ; Ridgic. Man. N. Amer. B. p. 47 (1887) ; Nelson, 



Rep. Alaska, p. 60 (1887) ; Cory, B. West Indies, p. 280 (1889) ; 



Rhoads, Pr. Ac. Philad. 1892, p. 101 (Corpus Christi, Texas) ; 



Cory, Cat. West Ind. B. p. 83 (1892). 

 Pelodes surinamensis, Heine Sf Reichen. Nomencl. Mus. Hein. p. 356 



(1890 : Mexico). 



Adult in summer. Similar to II. n'lfjra, but darker on the upper 

 ■parts, with a great deal of pure white on the carpal joints ; under- 

 parts very much blacker ; feet nearly black. Average dimensions 



