140 
LA RIDA 3 !. 
Genus STERNULA Boie. 
Sternula Boie, Isis, May 1822, heft 5, col. 563. Type (by monotypy) : 
Sterna mi nut a Li tine = S. alb if ram Vroeg. 
Sternula albifrons (Vroeg). 
JDistr .—Europe and India to Australia. 
[Sternula albifrons albifrons (Vroeg). (25-116.) 
Sterna albifrons Vroeg, ex Pallas MS., Cat. Rais. d’Ois. Adumb. 
p. 6, before Sept. 1764: Europe. Extra*limital.] (Fig. Dresser, 
viii. pi. 5S2.) 
Distr .—Europe. 
Sternula albifrons placens Gould. (25-113.) 
Sternula placens Gould, Ann. & Mag. Nat. Hist. ser. iv. vol. viii. 
p. 192, Sept. 1st, 1871: Torres Strait, Queensland. (Fig. Gould, 
N. G. v. pi. 72; Math. ii. pi. 111.) 
Sternula inconspicua Masters, Proc. Linn. Soc. N.S.W. vol. i. p. 63, Feb. 
1876 : Cape York. 
Sterna sinensis tormenti Mathews, Nov. Zool. vol. xviii. p. 210, Jan. 31st, 1912 : 
Point Torment, North-West Australia. 
Distr .— Victoria, New South Wales, Queensland, Northern 
Territory, North-West Australia, New Guinea, and Moluccas. 
Sternula albifrons sinensis (Gm.). (25-113.) 
Sterna sinensis Gruelin, Syst. Nat. vol. i. p. 608, 1789 : China. 
Distr .— China to Celebes. 
Sternula nereis Gould. 
Distr .— Australia, New Zealand, New Caledonia. 
Sternula nereis nereis Gould. (25-112.) 
Sternula nereis Gould, Proc. Zool. Soc. Lond. 1842, p. 140, Feb. 
1843: Bass Straits. (Fig. Gould, Austr. vii. pi. 29; Math 
pi. 112.) 
Distr. —South-East Australia. 
Sternula nereis horni Mathews. 
Sternula nereis horni Mathews, Nov. Zool. vol. xviii. p. 209, Jan. 31st 
1912 : Kalgan River, South-West Australia. 
Distr .—South-West Australia. 
Sternula nereis davisae M. & I. 
Sternula nereis clavisce Mathews & Iredale, Ibis, p. 245 April 1913 • 
New Zealand. 
Distr .—New Zealand. 
