THE BIEDS OF AUSTRALIA. 
back rather light brown and the tail chocolate-brown without any grey shade. The size 
of the bird is not nearly large enough to allow of its being confounded with A. stoUdus. 
p. 469 Anous galapagensis, sp. n. 
A. similis A. stolido, sed rostro minore et capite summo fuliginoso unicolori dis- 
tinguendus. Long. tot. 13.4 ; culmen 1.4 ; alae 10.65 ; caudae 5.5 ; taris 0.85. 
Hab. Galapagos Archipelago. Dalrymple Rock, Chatham Island. 
In the Cat. Birds Brit. Mus., Vol. XXV., Saunders admitted only A. gala- 
pagensis as distinct, but questionably so. AU the other forms were lumped 
under A. stolidus. 
In the Auk, Vol. XV., p. 36, 1898, Anthony added Anous stolidus ridgwayi 
from the Cocos and Socorro Islands with the “ Subsp. char. Much darker 
and less brown than A. raussaui, resembling in this respect A. galapagensis, 
from which if differs in much paler cap.” 
Just afterwards, reviewing the Birds of the Galapagos Islands, Rothschild 
and Hartert {Nov. Zool., Vol. VI., p. 191, 1899) reduced A. galapagensis to the 
rank of a subspecies only, remarking : “ We have specimens from the Carolines 
and Pelew Is. which are hardly separable,” but including specimens from 
all other localities as A. stolidus. 
In the Bull. Mus. Co7np. Zool. Harvard, Vol. XXXVI., p. 258, 1901, Bangs, 
writing on Liu Kiu birds, introduced Anous pullus : “ Characters : A large, 
very dark brown Noddy with a gray crown, nearest to A. rousseaui Hartl., of 
Madagascar and adjacent islands, from which it differs by being much darker 
in colour and slightly smaller in size.” The specimens from Liu Kiu measured, 
wing 271-273 against Mauritius wing 285 mm. 
Bangs noted that his “ pullus ” was “ much darker than A. ridgwayi 
especially about sides of head and throat, and the crown is darker and grayer.” 
“ From A. galapagensis Sharpe, the new species differs in not having as black 
a body or such a dark grey crown. From A. stolidus by its larger size and 
gray crown and forehead, the forehead and most of the crown of A. stolidus 
being white or yellowish white.” 
When Hartert {Nov. Zool., Vol. VII., p. 9, 1900) recorded the North-west 
Australian bird he called it A. stolidus pileatus, considering that the Philippine 
form ranged down to Australia. When I made up my “ Reference List ” 
{Nov. Zool., Vol. XVIII., p. 210, 1912), I accepted Hartert’s determination 
until such time as I should review them myself. 
As admitted by all writers, including Saunders, the Atlantic form is easily 
differentiated from the Indian Ocean and Pacific Ocean birds. This form 
would bear the name 
Anous stolidus stolidus (Linne) ; Atlantic Ocean. 
As synonyms may be cited Sterna senex Tuckey, Gavia leucoceps Swainson 
and A. superciliosus Sharpe. 
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