138 
LA RID AC. 
[Thalasseus bengalensis bengalensis (Lesson). (25-8G.) 
Sterna bengalensis Lesson, Traits d’Orn. 8e livr. p. G21, June 11th, 
1831: India. (Fig. Dresser, viii. pi. 583.) 
Replaces medea Horsfield, Trans. Linn. Soc. Lond. vol. xiii. p. 199, 
May 1821. Not Vieillot, Tabl. Ency. M6th. Ornitb. vol. i. p. 347, 
1820. 
Distr . —India. Ex tra-1 i m i tal. ] 
Thalasseus bengalensis torresii Gould. 
Tlialasseus torresii Gould, Proc. Zool. Soc. Lond. 1842, p. 140, 
Feb. 1843: Port Essington, Northern Territory. (Fig. Gould, 
Austr. vii. pi. 25; Math. pi. 107.) 
Tiialassens bengalensis robini Mathews, Austral Av. Rec. vol. iii.p. 55, Apr. 7th, 
1916: Cape York. 
Distr. —North Australia and New Guinea. 
Genus STERNA Linne. 
Sterna Linnej, Syst. Nat. 10th ed. p. 137, Jan. 1st, 1758. Type (by 
tautonymy): Sterna hirundo Linn A 
Chelido Bill berg, Syuops. Faunas Scand. vol. i. pt. 2, p. 193, 1828: new name 
for Sterna Linn. (c/. Austral Av. Rec. vol. ii. pts. 2, 3, p. 42, Oct. 23rd, 1913). 
Thalass&a Kaup, Skizz. Entwick-Gesli. Nat. Syst. p. 97 (pref. April), 1829. 
Type (by monotypy): Sterna dougallii Montagu. 
Hgdroceeropis Boie, Isis, 1844, heft 3, col. 178, March : new name for Sterna 
And. 
Sterna longipennis Nordra. (25-07.) 
Sterna longipennis Nordmann, in Krman’s Yerz. Thieren u. Pllanzen. 
p. 17, 1835: Mouth of Kuchtui, near Ochotsk, Siberia. 
Sterna glacialis Kittlitz, Denkwurd. Reise, vol. i. p. 322, 1858. (Pig. Middend. 
Sibir. Reise, pi. 25. f. 4.) 
Distr. —Lake Baikal to New Guinea. 
Sterna dougallii Montagu. 
Distr. —Europe, Africa to Australia. 
[Sterna dougallii dougallii Montagu. (25-70.) 
Sterna dougallii Montagu, Ornith. Diet. Snppl. 1813 (pref. June), 
no pag.: Scotland. (Fig. Dresser, viii. pi. 581.) 
Distr. —Europe and Africa. Extra-limital.] 
Sterna dougallii gracilis Gould. 
Sterna gracilis Gould, Proc. Zool. Soc. Lond., Oct. 1845, p. 76: 
Hputman’s Albrolhos, West Australia. (Fig. Gould, Austr. vii. 
pi. 27; Math. pi. 108.) 
Sterna nigrifrons Masters, Proc. Linn. Soc. N.S.W. vol. i. p. 62, Feb. 1876 : 
Warrior Reef, North Queensland. 
Sterna striata christopheri Mathews, Nov. Zool. vol. xviii. p. 209, Jan. 31st, 
1912 : Point Cloatos, West Australia. 
Distr. —Australia generally and New Caledonia. 
