BIEDS OF EGYPT. 193 



Eastern Africa he includes F. eleanorte from those parts as 

 synonymous with F. concolor, which seems to be the repre- 

 sentative of that species in the Red Sea ; for two pairs that he 

 shot in the archipelago of Kakara, in 1857, appeared to belong 

 certainly to F. concolor. 



Entire plumage uniform plumbeous grey, except the pri- 

 maries, which are dusky, and the shafts of the feathers, which 

 are dark ; cere and legs yellow ; beak horn-blue ; irides 

 brown. 



Total length 14 inches; culmen 0'75 ; wing, carpus to 

 tip, 1175 ; tarsus IS. 



Fig. Finsch & Hartlaub, Vog. Ost-Afr. pi. 1. 



180. Falco VESPERTiNUs, Linn. Bed-legged Falcon. 



This species ranges throughout Egypt and Nubia, but is 

 most abundant in the Delta. According to Von Heuglin it is 

 usually to be met with in small flocks of from six to twelve in 

 Lower Egypt, but singly in Nubia. It is most plentiful in 

 spring and autumn. 



It feeds chiefly upon insects, and consequently is most 

 likely to be met with while in pursuit of locusts in the corn- 

 fields. 



Male. — Plumage uniform deep slaty-grey, lightest on the 

 wings and lower part of the chest ; abdomen, thighs, and 

 under tail-coverts rich russet brown ; cere, base of the bUl, 

 skin round the eyes, and legs vermilion ; remainder of the 

 beak horn -blue ; irides brown. 



Entire length 11-5 inches; culmen 0"7; wing, carpus to 

 tip, 9'8 ; tarsus 1-1. 







