395 nn ' " Letters, Extracts, Notices, H^c. 



plumbeicoUis, is allied to A. cayennensis and A. aJbiventer. 

 The typical specimens were obtained at Jimenez, on the 

 Atlantic slope of the Republic, about 700 feet above the 

 sea-level. 



XXXIX. — Letters, Extracts, Notices, &;c. 



We have received the following letters addressed to the 

 Editor of 'The Ibis:'— 



Nortlirepps, March, 1889. 



Sill,— In 'The Ibis' for 1882, p. 313, I recorded the 

 measurements, in inches and decimals, of eight specimens of 

 Falco minor, and subsequently of two more at p. 107 of my 

 ' List of Diurnal Birds of Prey.' 



As all these specimens were from Southern or Tropical 

 Africa, with the exception of one from Anjouan Island, I am 

 desirous of placing on record, for comparison with the above, 

 corresponding measurements of six examples of this Falcon 

 collected in Madagascar by the Rev. James Wills and pre- 

 served in the Norwich Museum. 



Presumed Females. 



Wing. Tarsus. Middle toe s. u. 



in. in. in. 



Immature 12-8o 1-90 2-10 



Nearly adult 12-85 I'SO 2-10 



Presumed Males. 



Immature in change. . . . 11 "15 1'70 1-85 



Nearly adult 11-25 1-60 1-75 



Adult 11-35 1-70 1-70 



Adult 11-35 1-70 1-75 



The last-named specimen is remarkable for the hind claws 

 on both feet being yellow horn-colour ; the outer and middle 

 claws on the right foot are similarly coloured with the 

 exception of a line of black on the outer side, the remaining 

 claws being of the usual black colour. In this example the 

 tarsi and feet are bright yelloAV, inclining to orange, strikingly 

 different from their usual appearance in skins of this Falcon, 



