O14 
No. 54. Circus Airuginosus.* Lay. 
Tut Marsu Harrier. 
It seems probable, that this species breeds in the plains of 
India, in suitable localities. In the jheel-studded tract of coun- 
* Circus ARuGINosUSs. 
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tb. oz. 
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fy 
: (Six males and eight females measured and weighed.) 
The fourth or third and fourth primaries the longest. The first is 3:20 to 
4:00 shorter, the second 0°70 to 0:90, and the third equal to or not more 
than 0°20 shorter than the fourth. Exterior tail feathers 0°50 to 0°98 shorter 
than interior feathers. 
Description. The legs and feet are rich yellow, dingy or pale greenish 
yellow in the young, the claws brownish black. The irides are orange 
yellow, sometimes with a pink tinge, deep brown, or brownish yellow in the 
young. The bill is blackish or brownish black, yellowish at the base, and 
bluish there in the young. The cere is greenish yellow, or sometimes 
pale greenish, in the young. 
Piumace. I have little to add to Dr. Jerdon’s description, except that as 
the young bird advances towards maturity, there first appears a large rufous 
fawn, or rufous white patch upon the breast; then the rufous, or yellowish 
white of the head and nape, begins to run down the back of the neck, and 
margins of a similar colour begin to make their appearance on the feathers of 
the upper back and the smaller wing coverts. The colour of the upper parts 
slightly fades, and a greyish tinge begins to overspread the outer webs of the 
primaries, ‘ 
Further I should note, that the adult plumage described by Dr. Jerdon, in 
which the shoulders, secondaries and tail are silver grey, is according to 
European writers, never assumed except by the male, and though I cannot 
speak positively to this point myself, it is a fact that my large collection con- 
a a | 
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