GYR-FALCON. 31 



These coinciding observations from two distinguished 

 naturalists render any attempt at a technical description 

 unnecessary, beyond adding that the specimen from which the 

 present figure was taken measured twenty-three inches in 

 length from the point of the beak to the end of the tail : 

 the beak itself pale bluish horn colour, the cere yellow ; 

 the irides dark, as are those of all the true Falcons : the 

 head, neck, chest, under surface of the body, and under tail- 

 coverts, become pure white before the greyish brown spots 

 and bars are lost on the back and upper surface of the wings ; 

 the wing-primaries are dark at the tip, but do not reach to 

 the end of the tail : the tarsi and toes are yellow ; the claws 

 black, curved, and sharp. 



