244 ACCIPITER NISUS. 



which, with the lower tail-coverts, is reddish-white. 

 The long- tibial feathers are similarly barred, the short 

 ones light red. The long wing-coverts are pale red, 

 barred with dusky, and the dark bars of the quills are 

 more conspicuous on their under surface. 



Length to end of tail 13 inches, to end of wings 11 ; 

 extent of wings 23; wing from flexure 7i§ ; tail 6^ ; 

 bill along the back |, along the edge of lower mandible 

 I ; tarsus 21 ; first toe J^^ its claw ^| ; second ^-^^ its 

 claw ^^2 ; third 1/^, its claw f| ; fourth il, its claw /g- 



Feriale. — The female is much larger than the male, 

 the difference between the sexes being in no species 

 more apparent than in this. The colouring also differs 

 considerably, although the form and proportions are 

 nearly the same. All that has been said as to the bill 

 and intestinal canal of the male may be repeated here, 

 the only difference being in the size of the parts. The 

 cesopliagus is about five inches long, five-twelfths in 

 diameter ; the crop two inches long, and an inch and 

 one-twelfth in diameter when distended ; the proven- 

 triculus eight-twelfths long. The stomach is an inch 

 and three-twelfths long ; the intestine thirty-three and 

 a half inches, its largest diameter at the upper part 

 three-twelfths and a half, its smallest at the coeca two- 

 twelfths ; the coeca two-twelfths in length, and placed 

 at the distance of three inches and a half from the ex- 

 tremity ; the rectum three-twelfths and a half in diame- 

 ter, but enlarged towards the end to one inch. 



The bill, palate, irides, and feet, ai-e coloured as in 

 the male. The general colour of the upper plumage is 

 hair brown, tinged with grey (in old individuals bluish- 



