GREATER FRIGATE BIRD. 
The measurements negative the differentiation of more than one 
subspecific form as inhabiting the Mascarene Islands at present, but that does 
not mean that such may not later be recognised. I selected as type my 
Aldabra specimen, collected 23rd July, 1906, and named the subspecies, in 
the Austral Av. Record, Vol. II., p. 119, 1914: 
Fregata minor aldabrensis 
Aldabra ; Seychelles ; Glorioso. 
The figures show the 
$’s Culmen 116-120 wing 605-621 tail 395-430 mm. 
(^’s „ 98-106 „ 594-606 „ 390-410 
If the other specimens be accepted as correctly sexed, it would mean 
that the bill in the male reaches 120 mm., but no increase in the 
wing-length. 
The small bird from Christmas Island, Indian Ocean, which Sharpe 
mis- identified as F. ariel, is a very distinct subspecies. 
Two males measure : 
Culmen 96 wing 558 tail 365 middle toe 50 mm. 
„ 96 „ 530 „ 385 „ 53 
While the female measures : 
Culmen 107, wing 599, tail 410, middle toe 54 mm. 
The general coloration is the same as is in the preceding. 
I named this subspecies, in the Austral Av. Record, Vol. II., p. 119, 1914 : 
Fregata minor listeri 
Christmas Island, Indian Ocean (breeding). 
I am using this name for the North Australian bird, as no specimens 
are available for accurate determination, the supposed Queensland birds 
measuring : 
ad. Culmen 100 wing 550 tail 420 middle toe 55 mm. 
ad. „ 105 „ 565 „ 370 „ 50 
These figures agree fairly with the Christmas Island birds as known at 
present. 
A black male from Malacca measures : 
Culmen 93, wing 530+, tail 365+, middle toe 48 mm. 
This would belong to the same subspecies. 
The mid-Pacific form cannot be defined, as no series is available, though 
two names have been given. The only two birds are very young, yet 
they measure : 
Culmen 111 wing 590 tail 345 middle toe 55 mm. 
„ 109 „ 580 „ + „ 48 
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