ACCIPITER. 
separable from the central group, of which A. nisus is the type, namely, 
that which is composed of those species which assimilate in the character 
of their markings and coloration to the Asturine subgenus Urospizias. 
These are three in number, viz., A. cirrhocephalus, A. rubricollis, and A. 
erythrauchen.''^ 
The bill is very short and formed as in Urospiza, the loreal bristles 
covering the oval semi-operculate nostrils. 
The wing is long, the first primary very short, the fourth longest, 
the third subequal with the fifth, and the second less than the sixth. 
The tail is very long, square, and about equal to three-fourths the 
length of the wing. 
The tarsus is more than one-third the length of the tail, and in the 
adult shows a complete fusion both in front and behind ; in the immature, 
however, the face is seen to be regularly scutellated and the back to be 
covered with reticulate scales, a few of which towards the hind toe are larger 
and look like scutes. 
The feet are slender, the middle toe especially lengthened and more 
than half the length of the tarsus. 
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