474 MR. A. R. WALLACE ON NEW BIRDS [June 13, 
antiquorum. But one of the most striking and characteristic differ- 
ences in this part of the skeleton is the greater length of the meta- 
carpal bones and phalanges, which in both the Hull and Utrecht 
specimens, not only relatively but even actually, exceed those of the 
full-grown P. antiquorum, 70 feet in length. 
8. Lastly, the daleen. This is not preserved in the Utrecht spe- 
cimen; but in the Hull skeleton it is in excellent condition, and 
shows a striking difference from that of the common species in being, 
of a uniform deep black, instead of dark olive-brown or horn-co- 
lour, variegated towards the ends of the series with patches and 
stripes of a lighter colour. 
4, Descriptions oF New Birps From THE Matay ARCHI- 
pELAGO. By ALrrep R, Wauuace, F.Z.S. 
(Plates XXVIII., XXIX.) 
I have here given the characters of twenty-one species of birds 
which appear to be new, and which, together with those already de- 
scribed by Mr. G. R. Gray and myself in the ‘ Proceedings’ of this 
Society, and also a few described by Mr. Gould and Dr. Sclater, make 
up the number of 212 new species collected by me in the islands of 
the Malay archipelago. - Of those now described, eight are from Ce- 
lebes, and the rest from Sumatra, Borneo, the Moluccas, and the 
New Guinea group. 
ACCIPITER ZQUATORIALIS. 
Supra cinereo-plumbeus, subtus cum torque humerali rufo-casta- 
neus ; capitis lateribus cinereis, gula pallide rufo-cinerea, cauda 
alisque immaculatis. 
Above slaty ash-colour ; beneath light chocolate-brown, which ex- 
tends in a broad collar between the shoulders ; sides of the head ash- 
colour ; throat light ashy, tinged with rufous ; wing and tail uniform 
light ash-colour beneath ; under wing- and tail-coyerts scarcely paler 
than the belly ; bill and claws black ; cere, eyelids, and legs orange- 
yellow ; iris golden orange-yellow. : 
3. Total length 143 inches; wing 72; tail 6; tarsus 2; bill, to 
ape, 14. 
: 0 . Total length 163 inches; wing 9; tail 72; tarsus 22; bill, 
to gape, 15%. 
Hab. Batchian, Gilolo, Morty Islands, Waigiou, and Salwatty. 
Remarks.—This species was pointed out to me by Mr. Gurney as 
being near A. rufitorques, Peale, which inhabits the Feejee Islands. 
It differs from that species in its rather larger size, different propor- 
tions, and coloration. It is also near 4. griseogularis, G. R. G., 
which inhabits the same district ; but differs from that species by 
its much smaller size, and in the entire absence of bands on the body, 
wings, or tail in the adult birds. Both these seem to be included 
