74 
Birds of Celebes: Falconidae. 
Measurements. 
Wing 
Tail 
Tarsus 
Culmen 
from cere 
a. (C 10479) [$], Celebes 
295 
195 
35 
22.5 
h. (Sarasin Coll.) Q, S. E. Central Celebes, 7. VUI. 95 
323 
202 
37 
24 
c. (Sarasin Coll.) cT, S. E. Central Celebes, 7. YIII. 95 
300 
190 
37 
24.5 
d. (C 14625) ad. [cj’], Banggai Id., V.-VIII. 95 (Nat. Coll.) 
290 
187 
36 
26 
Tlie specimen from Banggai is like the adult male from S. E. Central Celebes 
in the Sarasin Collection. As a rule the species of Sula do not differ from those 
of Banggai and Peling. It is possible, however, that when more specimens from Sula 
are to hand they will be found to present some j)oints of difference, as is suggested 
by the two examples in the Leyden Museum. 
The following notes were made there: 
a, Sula Besi (Bernstein), 
h. Q^, Sula Mangoh (Bernstein). 
Similar examples with grey cheeks and ear-coverts, dark slaty head with black crest ; 
throat-streak black, more developed in one (that figured by Schlegel, Valkv. pi. 28, 
fig. 4) than in the other; chest unifoi-m light chestnut-rufous; rest of under surface 
banded with the same colour (somewhat browner at sides) and wliite: 
c. $ [?], 77orth Celebes (Porsten), 
d. (5*, Manado (v. Duivenb.), 
e. — , Manado (v. Musschenbr.). 
Three similar examples, corresponding with a and b in having grey cheeks and 
ear-coverts and dark slaty head with black crest; but the bars on the under surface 
are not of the same tint as the chest, being browner (hair-brown). Pi’obably 
the adult plumage, birt in one the first primary on each side is not fully grown: 
f. — , Manado (v. Musschenbr.), 
g. — , Minahassa (v. Musschenbr.). 
Two immature (or female) specimens, with cheeks and ear-coverts rufous (or rufous 
brown); crown of head rufous with black centres and tips to the feathers; crest black; 
breast rufous; under surface banded with the same colour, one specimen agreeing 
in this respect with the Sula birds, though those appear to be adult; in the other 
specimen (probably the younger) the rufous colour predominates on the under surface, 
the wlute cross-bands being very ill-determined. 
Adult males from Sida may, therefore, prove to differ from adult males from 
the Minahassa by having the under surface banded with rufous like the chest, instead 
of with hair-brown. 
Distribution. Celebes to Sula. — Minahassa (Porsten a 1, hi, 1, v. Duivenbode i, Meyer 
c 5, etc.); S. E. Central Celebes fP. & P. Sarasin 2); South Peninsula (Wallace 
ei/); Banggai Island (Nat. Coll.); Sula Besi and Sula Maiigoli (Allen cl, Bern- 
stein 1, Hoedt 1). 
Under the original description of Basa remvardti (a 1) there were included 
a female specimen obtained near Lake Tondano, North Celebes, by Forsten, 
a female from Pontianak, Borneo, and three males — at first erroneously stated 
to have come from Manado, but which were afterwards found to have been 
obtained in Amboina and Ternate (Schl., Rev. Acc. 1873, 133, Nos. 1, 2 and^2).)_ 
These last three specimens belong to a very distinct species and should be 
