136 LIST OF DIUKNAL BIRDS OF PREY. 



single specimen out of 120 does it appear to be so thoroughly 

 and entirely reticulate as in that species/^ 



The only instance in which I have met^ in an example of 

 B.ferox, with a tarsus as completely reticulate as in B. leuco- 

 cephalus is that of a specimen in the collection of Mr. See- 

 bohm^ which was formerly in that of the late Mr. A. Anderson, 

 but which has no locality attached to it. 



I refer this specimen to B.ferox, as its general dimensions 

 appear to be hardly large enough for B. leucocephalus , but 

 more especially on account of the smaller size of the claw of 

 the inner toe, which measures along the curve about I'l, 

 whereas in a female B. leucocephalus in the Norwich Museum 

 this claw measures fully 1"4, and in another female referred 

 to by Mr. Hume, who points out this peculiarity of i?. leuco- 

 cephalus in his article which I have already quoted, it 

 measured 1'85. 



The other dimensions of Mr. Seebohm^'s specimen are : — 



in. 



Wing 17-45 



Tarsus 3'30 



Middle toe s. m 1-90 



The specimen of B. leucocephalus in the British Museum, 

 which is the tyjoe of Hodgson''s B. aquilinus, has no memo- 

 randum of sex attached to it ; but its dimensions, which are 

 as under, perhaps indicate that it is a male, though a still 

 smaller specimen (with a wing measuring only 18"60) is 

 stated by Mr. Hume (/. c.) to have been a female. I add, 

 for comparison, the measurements of five other specimens, 

 all ticketed by the collectors as females : — 



TXT- rr Middle 



Winff. Iarsu3. 



° toe s. u. 



In the British Museum : in. in. in. 



Type of B. aquilinus IS'oO 3-25 1-60 



$ . Dauiia 2000 3-60 1-80 



2 . Hangchow, China 19-50 3-30 1-90 



$ . Pootuug, China 19-50 3-30 1-90 



$ . Shanghae, China 19-30 3-40 1-70 



In the Norwich Museum : $ . Shanghae . . 18-90 3-40' 1-80 



' In the 'Ibis' for 187t>, p. 369, 1 erroneously gave this measurement 

 as 3-20. 



