122 



LIST OF BIURKAL BIRDS OF PREY. 



proportion of the toes, I believe to be due to individual 

 variation. 



I annex particulars of the measurements and markings of 

 seventeen specimens which I have examined ; and in the 

 result I have to express my belief that the specific names 

 " concentricus" and "pelzeini" must both sink into synonyms 

 of M. gilivcollis : — 



It seems to me that the diflFerences in measurement between 

 the seventeen specimens whose dimensions are given above 



^ The sexes, wliere noted, have been so marked by the collectors. The 

 majority of these specimens are in the collection of Messrs. Salvin and 

 Godman, and the remainder in the Norwich Museum. 



