ACCIPITER RUFIVENTRIS. 
mandible towards base a light horn colour, towards and at tip liver-brown, 
its edge below and in front of nostrils greenish yellow ; lower mandible 
below and at base greenish yellow, — elsewhere liver-brown. Cere greenish 
yellow. Eyes bright yellow. 
Female . — Upper parts, wings, under tail coverts, and tail, coloured as in 
the male. Sides of neck, lower portion of throat, breast, belly, vent, and 
thighs white ; each of the feathers of the sides of the neck marked with 
a narrow longitudinal brown line, those of the breast, belly, vent, and 
thighs with a similar line, and besides with several narrow waved yellowish 
brown bars, irregularly edged with brownish red. The colours of the tarsi, 
toes, claws, bill, cere, and eyes, as in the male. 
Form, &c. — Figure moderately slender and like that of the Sparrow Hawk 
{Accipiter Nisus) of Europe. Upper mandible strongly hooked, nostrils oblong 
and suboval, bristles at angles of mouth many and rigid. Wings when folded 
reach nearly to the middle of the tail, the fourth quill feathers the longest, 
the fifth nearly of equal length, the third slightly shorter and rather longer 
than the sixth, the second and seventh nearly equal, and about an inch 
shorter than the third, the first about half the length of the fourth. Tail 
nearly even, or only very slightly rounded. Tarsi long and slender, anteriorly 
scutellated, posteriorly reticulated. Toes long and rather slender, the inner 
one much the shortest, the outer and middle ones connected at base by a well 
developed membranous web. Claws long, slender, considerably curved, and 
sharp pointed. 
DIMENSIONS. 
Male. Female. 
In. Ls. In. Ls. 
Length from the point of the 
bill to the base of the 
tail 7 0 8 6 
of the bill to the angle of 
the mouth... 0 8 0 10 
of the wings when folded 8 0 8 8 
of tail 6 2 7 4 
Male. 
Female. 
In. 
Ls. 
In. 
Ls. 
Length of the tarsus 
i 
9 
2 
0 
of the outer toe 
0 
10 
0 
11 
of the middle toe .... 
1 
4 
1 
H 
of the inner toe 
0 
7 
0 
n 
of the hinder toe . . . 
0 
6 
0 
The individual represented in the plate and lettered C, is of the same 
species but of a different age from the other two. The character of its 
colouring would indicate it as the adult bird, and if such be the case, the 
others must be regarded as not exhibiting the mature plumage. It is of the 
