130 LABIDJi;. 



n" . Imm. sk. Pelew Is H. Saunders Coll. 



o". Ad. sk. Loo-choo Islands, Aug. 1886. Seebohm CoU. 



p"-t". Ad. sk. Amoy, China, June and July Swinhoe Coll. 



{li. S.). 



u". Ad. sk. Amoy, June. H. Saunders Coll. 



v", w". Skeletons. North Australia {Macgillivray). Voy. H.M.S. ' Rattle- 



snake ' [P.]. 



33. Sterna trudeauii. 



Sterna trudeauii, Audub. Om. Biogr. v. p. 125 (1839) ; id. Synop. 



p. 319 (1839); id. B. N. Am. 8vo, vii. p. 105, pi. 435 (1844); 



Gray, Gen. B. iii. p. 659 (1846) ; Gay, Hist. Chile, Zool. i. p. 484 



(1847) ; Baird, Cass., Sj- Laivr. B. N. Amer. p. 861 (1858) ; Baird, 



Cut. N. Amer. B. no. 687 (1859) ; Sc/ileg. Mus. P.-Bas, Sternse, 



p. 29 (1863 : Brazil) ; Gray, Hand-l. B. iii. p. 118, no. 11027 (1871); 



8cl. Sf Salv. P. Z. S. 1871, p. 570 (revision) ; Landbeck, Ann. Univ. 



Chil. 1872, p. 515 ; Coues, Key N. Amer. B. p. 322 (1872) ; id. 



Check-L no. 571 (1873) ; Scl. ^ Salv. Nomencl. Av. Neotrop. p. 147 



(1873); Coves, B. N.-West, p. 675 (1874) ; Saunders, P. Z. S. 



1876, p. 660 (revision) ; Durnf. Ibis, 1877, p. 200 (La Plata) ; 



Ridyw. Bull. U.S. Nat. Mus. no. 21, p. 53 (1881) ; Coues, Check-l. 



2nd ed. p. 124, no. 802 (1882); id. Key N. Amer. B. 2nd ed. 



p. 7()7 (1884) ; Baird, Brew., Sf Ridgw. Water-B. N. Ama: ii. 



p. 290(1884); Taczan. Orn. Perou, iii. p. 443 (1886: Arica) ; 



Ridgw. Man. N. Amer. B. p. 4] (1887) ; Scl. ^ Hudson, Argent. 



Orn. ii. p. 195 (1888) ; Holland, Ibis, 1890, p. 428 ; id. op. cit. 



1892, p. 212 (Buenos Ayres, breeding) ; Saunders, P. Z. S. 1891, 



p. 373 (eggs, Arirentina). 

 Gelochelidon trudeaui, Boie, Isis, 1844, p. 187. 

 Phaetusa sellovii, Licht. Nomencl. Av. p. 98 (1854 : Maldonado)*. 

 Thalasseus trudeaui, Bj). C. R. xlii. p. /72 (1856). 

 Sterna frobeenii, Phil. <§• Landb. Wiegm. Arch. 1863, p. 125 (Arica 



Bay) ; iid. Cat. Av. Chil. p. 49 (Jide Scl. et Salv.) ; Gray, 



Hand-l. B. iii. p. 118, no. 11032 (1871) ; Landb. An. Univ. Chil. 



1872, p. 615. 

 Phaetusa trudeauii, Bias. J.f. O. 1866, p. 73 (revision). 

 ? Phaethusa chloropoda, Heine fy Reichenow, Nomencl. Mus. Hein. 



p. 355 (1890: Chile). 



Adult in breecling-pluntage. Forehead, crown, and nape pure 

 white ; in front of the eye a black patch, and behind the eye to 

 beyond the auricle a black streak about 1 inch long ; neck and 

 mantle pearl-grey ; wings rather paler, the secondaries broadly 

 edged with white, the iipper primaries less so, the lower primaries 

 dark grey on or near the margins of the inner webs, the " wedges " 

 nearly white, the portions of the webs next the shafts pale grey, all 

 the shafts white ; rump nearly white ; tail-feathers pale pearl-grey, 

 the streamers lightest and silvery white on their outer webs ; abdo- 

 men and breast grey, like the mantle; chin white; under wing- 

 coverts dead white : bill, yellow at its basal half, banded with black 

 at the genys, and tipped with pale lemon-yellow ; tarsi and toes 

 dull orange, the hind tpe long, free and somewhat high up. Total 



* Type in Berhn Museum examined. 



