238 JOURNAL, BOMBAY NATURAL HIST. SOCIETY, Vol. XXV 



Type. Genus. Specias. 



E. Archiboteo. .Large 



F. Elanus ..Very small 



„ MiLvus . . Medium 



,, Haliabtuk 



,, BUTEO 



„ Pernis 

 Ci. Haliaetos 



,, POLIOABTUS 



Large 



Medium 



„ CiKGABTUs ..Large 



„ Spilornis . . Medium 

 „ Butastur . . Small 



Circus 



. Medium 



75" to 3 75" in length, 



,. AsTUK . . Medium to small 



„ AcciPiTEK . . Small 



H. Falco . . Medium to small q 



„ iEsALON ..Small ,.q 



„ TiNNtJNOULU.S. . 



Characteristics. 



The same as for the Type. 



h. Tarsus very short, under 1^" in length. 



h. Tarsus over 2", scutellated in front, not 

 behind ; i. tail forked ; j. colour dark 

 brown. 



h. As for Milviis; i. tail rounded; j. 

 colour in adults maroon above, white 

 below. 



h. Tarsus from 2 



with transverse shields behind. 



k. Bill compressed and weak ; 1. lores and 

 sides of h^ad covered with small scale 

 like feathers. 



h. Tarsus with some scutellse broader 

 than high, over 4" in length ; m. claws 

 grooved beneath. 



h. As for Haliae'u^, but under 4"; m. claws 

 rounded beneath, outer toe partially"- 

 reversible. 



h. Tarsus reticulated throughout, no 

 scutelliB broader than high ; n. no 

 crest. 



h. As for Circaetus ; n. broad nuchal 

 crest-.. 



h. Scales in front of tarsus larger than 

 those behind, iiot scutellated behind. 

 Those in front practically the same 

 size from base of tarsus to near the 

 base of mid-toe and not diminishing 

 in size gradually, o. irides white in 

 adults. 



h. Tarsus with transverse shields in 

 front and smaller polygonal scales be- 

 hind. The scales in front largest near 

 the top end and rliminishing in size 

 lower down, where they become gradu- 

 ally absorbed in the reticulation near 

 base of mid- toe. o. irides yellow or 

 light brovvn. 



h. Tarsus scutellated beh-nd and in front : 

 p. bill from gape ^/3rd to f of mid-toe 

 without claw. 

 h. As for Aatur ; p. bill from gape about 

 ^ mid-toe without claw. 

 2nd quill longest, 1st much longer 

 than 4th ; i. tail rounded ; r. upper 

 plumage grey or brown, 

 q. 2ik1 and 3rd quills longest and sub- 

 equal, 1st and 4th, also subequal. 

 i. Tiil graduated, a di'ference of IV'to 

 2' between the middle pair and outer 

 tail feathers a broad dark band on 

 end of tail, the cKtreme tip white; 

 r. upper plumage reddish. 



