240 JOURNAL, BOMBAY XATURAL HIST. .SOCIETY, Vol. XXV. 



Type. Gpnv.s, 



BUTEO 



Species. 



Characteristics. 



F. 



ClRC^TUS 



Spilornis 

 butastur 



Haliaetus 



G. -I 



Circus 



ASXUR 



ACCIPITEK 



f Fal<;o 



H. .) 



2/3rd 

 front 



, B. desertorum 



C. gallicus 

 , S. cheela 



B. teesa 

 . H. leuconjphus 



PoLiOAETUS . . P. ichthijaetufi 



B. leucucepludux . . a. Wing over 16" ; b. tarsus 

 feathered, naked part in 

 reticulated. 



a. Wing under 16". 



As for genus. 



As for genus. 



As for genus. 



a. Tarsus 4"-4-2"; b. tail about 

 12", rounded, the outer feathers 

 not much shorter than middle 

 pair, white band across it, about 

 3" from the end ; c. feet dirty 

 white. 



a. Tarsus 4/3"; b. tail about 13", 

 wedge shaped, middle feathers 

 considerably longer than the 

 outer pair, white except at the 

 extreme tip ; c. feet yellow. 

 Basal f of all tail feathers 

 white, in adults, mottled in 

 young ; b. length about 27"-29", 

 tarsus 3-7." 

 Middle tail feathers brown 



. li. albicillu 



a. 



. P. humilis 

 . C. macrurus 



. C cijaneus 



. C. eeruginosus 



.A. palumbarius 

 . A. badius 

 .A. nisus 



. A. virgatus 



. F. peregrinus 



throughout ; b . 



length 



about 



1\ peregrinator 

 F. bnrbarun 



, a. Outer web of 2nd, 3rd and 



4th primaries notched but not 



of oth ; b. wing 14i-" ; tarsus 



under 3". 



a. Outer web of ."ith quill notched; 



wing under 15", tarsus about 3" 

 a. b. Wing over 1()" and tarsus 3V' 



about, 

 a. Size large, wing 12" to lo". 

 a. Size small, wing 7" to 9". 

 a. No gular stripe, 5 or 6 dark 



bars, one terminal, on 4th quill 



in adults, 

 a. Generally a dark gular stripe ; 



7 or 8 bars on 4th (juill in 



adults, 

 a. Length 16" to 19" ; b. 1st pri- 

 mary longer than the 3rd ; c. 



cheek stripe broader than the 



eye, no nuchal collar ; d. crown 



dark grey, breast very slightly 



rufous, 

 a. Length 15" to 18" ; b. and c. 



as for above ; d. crown blackish. 



breast generally deep rufous, 

 a. Length 15" to 1 7" ; b. as for 



ab<»ve ; c. cheek stripe narrow, 



a bufl' nuchal collar, head ashy 



grey or rufous. 



