58 
11:49 ; (second primary the longest, Ist 0°35 shorter, 3rd 0°5 
shorter. Tail, 6; exterior tail feathers, 0-4 shorter than central 
ones.) ‘Tarsus, 1°85. Foot, greatest length, 3-3; greatest width, 
3°2; mid-toe, 1°7 ; its claw on curve, 0°8; hind toe, 0°75; its claw 
on curve, 1*1 ; outer toe 12 ; its claw, 0°75; inner toe, 1 ; its claw, 
0-87. Bill, straight from margin of cere, 0.72; on curve, from 
cere, 0°87; from gape, 1:1; width at gape, 0°89; height, at 
margin of cere, 0°4 ; width of cere, 0°3. 
“This bird,’’ Mr. Blyth mentions, “is / Ruber Indicus (Aldro- 
randi) and F. Communis indicus, Gmel. and undoubtedly /. Su/- 
taneus, Hodgson. Mr. Layard obtained this species in Ceylon.” 
No. 9. (bis). Falco Atriceps, Sp. Nov. 
Tuer Buack Carp Fatcon. 
The species to which I have provisionally given the above 
name, closely resembles Perigrinator in size, flight and habits, 
but is, I believe, distinct. I have as yet only obtained adults, 
(one of which is now with my friend Mons. Jules Verreaux,) 
and I can therefore only indicate the differences between full 
grown birds of this and the preceding species. The whole head, 
nape, cheek stripe, cheeks and sides of the head, are black, 
forming one unbroken cap, and showing no separate cheek 
stripe, as all our other Indian Falcons do. In this latter 
respect, it differs from these, just as the Indian Hobby, (H. 
Severus, Horsf.) does from the Huropean; the cheek stripe, 
cheeks, and ear coverts being confluent or very nearly so. The 
whole of the rest of the upper parts, are a clear Peregrine slatey 
blue, closely and conspicuously barred, as in the Peregrine, with 
dusky slatey, and differing in this respect from the adult Peri- 
grinator, which has these parts nearly tree from bars. Beneath, 
it is never so rufous as Perigrinator usually (but not inva- 
riably) is, and it has the thigh coverts, and under wing coverts 
closely, though narrowly, barred, while in the old Perigrinator, 
the lower parts are nearly spotless. The bars in the inner webs 
of the primaries are narrow and close, as in Perigrinator and, in 
this respect, differ conspicuously from those of the Peregrine’s 
wing. 
Dr. Jerdon, to whom I showed specimens of this species, 
entertained no doubt as to their differmg from any of the true 
Perigrinator, that he had seen in Central and Southern India, 
and remarked that, “if distinct, this is probably the Neela 
Shaheen of native falconers, and may be identical with one of 
