11. GYGI9. 149 



a. cJ ad. sk. Kauai Id., Sandwich Is., April Hon. Water Rotk- 



21, 18!J1 (If. C. Palmer). .schild [P]. 



A. Ad. sk. Seindw\chIii.(H.M.S. 'Blonde'). Capt. Lord Byron, 



K.N. [P.]. 



11. GYGIS. ^^p^ 



Gygis, Wagler, Isis, 1832, p. 1 223 G. Candida. 



Range. Intertropical seas. 



Key to the Species. 



a. Larger: bill stouter: tail more pointed, the 



second feather from tlie outside the longest ; 



shafts usually brownish Candida, p. 149. 



b. Smaller : bill more slender, especially in front 



of the genys ; tail shorter, more rounded, the 

 third feather from the outside the longest ; 

 shafts pure white mlcnn-hyncha, p. 152. 



1. Gygis Candida. 



The White Tern, Lath. Gen. Syn. iii. pt. 2, p. 363 (1785) ; id. ibid. 

 Suppl. i. p. 26() (1787) ; Portlock's Voy. Round the World, p. 312 

 pi. (1789 : Sandwich Is.). 



? Sterna alba, Sparnn. Mtis. Carls, ii. fasc. i. no. 11 (1786) ; Gm. 

 Syst. Nat. i. p. 607 (1788). 



Sterna Candida, Gm. Si/st. Nat. i. p. 607, no. 19 (1788); Forster, 

 Descr. An. pp. 179, 210, 247 (1844). 



Sterna alba. Lath. hid. Orti. ii. p. 808 (1790) ; Bontt. Enc. Meth. i. 

 p. 94 (1790); Steph. in Skate's Gen. Zonl. xiii. pt. 1, p. 160 

 (1826) ; Lesso7i, Traite, p. 623 (1831 : Tahiti) ; Vigors, Zool. Toy. 

 'Blossom,' p. 38 (1839: Pitcairn I.); Reichenb. Natat. tab. xxi. 

 figs. 818-19 (1848); Schl. Sf Poll. Favne Madag., Ois. p. 150 

 (1868); Hard. Wiegm. Arch. 1852, p. 126; Schl. Mus. P.-Bas, 

 Sterna, p. 35 (1863). 



Sterna semi-alba, Bonn. Enc. Meth. i. p. 94 (1790). 



Gygis Candida, Wayler, Isis, 1832, p. 1223, ex J. R. Forster, 3IS. (rype 

 of genus); Grai/, List Gen. (1840) p. 79; id. op. cit. (1841 )p. 100;" id. 

 List B. Brit. Slus., Anseres, p. 180 (1844) ; Boie, Isis, 1844, p. 185 ; 

 Gra!/, Gen. B. iii. p. 660 (1846); Gould, B. Australia, vii. pi. 30 

 (1848) ; Reichenh. T'og. Nenholl. p. 347 (1850) ; Hartl. Wieipn. 

 Arch. 1852, p. 126 ; id. J.f. O. 1854, p. 169 ; Bp. C. R. xlii. p. 772 

 (1856); Kittlitz, Reise, i. p. 382, ii. p. 39 (1858: Ponape) ; 

 Gray, Cat. B. Trap. Is. Pacifc, p. 59 (1859); G. Bennett, 

 Gath. Nat. Austr. p. 241 (1860: Moreton Bay); Hartl. Faun. 

 Madag. p. 86 (1861 : Mauritius) ; Pelz. Reis. Norara, Voy. p. 155 

 (1863: Tahiti & N. Caledonia); Gould, Hand/). B. Austr. ii. 

 p. 405(1865); Melliss, Ibis, 1870, p. 106 (St. Helena, breeds) ; 

 Pelzeln, Ibis, 1873, p. 123 (type of Latham's White Tern in 

 Vienna Mus.); Tristr. Ibis, 1876, p. 266 (New Hebrides); 

 Saunders, P. Z. S. 1876, p. 667 (revision) ; id. op. cit. 1877, p. 797 

 (Ascension & Tahiti); id. Journ. Linn. Soc. xiv. p. 404(1878: 

 distribution) ; David ^- Oustal. Ois. Chine, p. 529 (1877) ; Sharpe, 

 P. Z. S. 1878, p. 273 (Ellice Is.) ; Ramsay, Pr. Linn. Sue. N. S. JV. 

 1878, p. 201 ; Penrose, Ibis, 1879, p. 279 (Ascension, breeding) ; 

 Finseh, Ibis, 1880, pp. 220 & 332 (Marshall Is.) ; Satoiders, 



