Mr. R. B. Sharpe's Catalogue of Accipitres. 441 



and the grey tints darker than is the case in paler specimens 

 from less southern localities*. 



In connexion with the occurrence of specimens of an inter- 

 mediate character in Egypt, I may refer to the circumstance 

 of my son and a fellow-traveller having shot an adult pair of 

 these Falcons at Esne, in that country, which were sitting 

 together on the same tree, and of which the female was a 

 typical pale F.feldegyii, and the male sufficiently dark to 

 merit the title of taaypterus, being very little less intensely 

 coloured that the darker individuals from Abyssinia or 

 Sennaarf. 



I append a list of measurements taken by myself from 

 specimens of both races, which in this Table I have not 

 attempted to separate, my object being merely to show the 

 variations of size incident to the geographical distribution of 

 these Falcons ; and for that purpose I have, in this instance, 

 treated F. feldeggii and F. tanypterus as one species without 

 reference to subspecific distinctions. 



Males, ascertained and presumed. 



Wing, 

 in. 

 One from Persia 1300 



Eig-htfrom Morocco and Al- I 



< to 



^"•^" I 12-80 



One from Tunis 13-10 



( 13-00 



Six from Eg}^t < to 



I 13-40 



I 12-40 



Six from Nubia and Abyssinia < to 



I 13-50t 



* According to Mr. Dresser {vide ' Birds of Europe/ vol. vi. p. 54) 

 thescutella on the tarsus are larger in F. fanypterns than in F. feldeggii ; 

 but I have been unable to detect any such difference in the specimens 

 ■which I have examined. 



t Vide ' Rambles of a Naturalist,' by J. H. Gurney, Jan., p. 135. 



X This specimen was shot and sexed by Mr. Blnnford. 



