ZOSTEROPID^E. 167 



North-east Africa between 5° and 16" N. lat. is inhabited by 

 two nearly allied species, Z. abyssinica and Z. poliogastra, the 

 former ranging eastward into Socotra Island. 



In Equatorial Africa there is an olive group comprising 

 Z. ewycricota, Z. Mkv/yuensis, Z. jacksoni and Z. stenocricota, the 

 latter known only from Camaroons, which is also the home of 

 Speirops m elanocephala. 



Z. virens represents this olive group in eastern South 

 Africa, south of 10° S. lat. 



The white-breasted group, to which Z. abyssinica and 

 Z. poliogastra belong, is represented in South Africa by 

 Z. capensis south of 27° S. lat., and by Z. pallida from Swellen- 

 dam to Rustenberg. 



The remaining eighteen species are confined to the following 

 islands : — 



Prince's Is., Z. Jicedulina and Speirops leucophsea. 



St. Thomas Is., Speirops lugubris. 



Annobon Is., Z. griseovirescens. 



Mauritius Is., Z. chloronota, Malacirops mauritiana. 



Reunion Is., Z. olivacea, and Malacirops borbonica, and 

 M. e-newtoni. 



Madagascar, including Gloriosa Is., Z. madagascariensis and 

 Z. hovariim. 



Mayotte Is., Z. mayottensis. 



Johanna Is., Z. anjuanensis. 



Great Comoro Is., Z. hirlri, Z. mowroniensis and Z. comorensis. 



Aldrabra Is., Z. aldabrensis. 



Seychelles Archipelago, Z. semijiava and Z. modesta. 



KEY TO THE GENERA AND SUBGENERA. 



a. Upper tail-covert never white but nearly 

 uniform with the back. 

 a 1 . Lores never white ; white on head 



