thern Nigeria by Robin Kemp at Bnriitu in April and by Petit at 

 Bonny. Curiously enough we hâve no spécimens from Northern 

 Nigeria in the British Muséum. 



In the Trans. Zool. Soc, XIX, 19 lo, p. 321. Ogilvie-Grant 

 pointed out that C. obscurus obscurus from the type locality (Fer- 

 nando Po) differed from the birds found on the mainland by having 

 the underparts greenish-white rather than olive and by their 

 slightly larger size. He failed to distinguish between West African 

 examples and spécimens form Abyssinia-the type locality cf 

 C. ragazzii Salvadori, and therefore proposed to use Salva- 

 DORi's name for mainland spécimens which he believed to range 

 throughout West Africa and Eastwards to Uganda and Abvs- 

 sinia. 



We hâve a very large séries of C. obscurus in the Natural 

 History Muséum examination of which proves Ogilvie-Grant to 

 hâve been correct in restricting ('. obscurus obscurus to the typical 

 locality of Fernando Po, birds from which island are appreciably 

 lighter on the underparts (a pale greenish-white colour), hâve the 

 base of the under-mandible whiter as also the throat and average 

 a larger size; of 22 adult spécimens from Fernando Po which I 

 measured only one fell below 60 mm. in the wing measurement 

 which ranged from 58-68 mm. and averaged 64 mm. (décimais not 

 included). The resuit of measuring 71 adult examples from the 

 mainland of West Africa, from Portuguese Guinea to Angola 

 (excluding ail Belgian Congo birds) shows that the wing varies 

 between 52 and 65 mm. and averages 5g (décimais not included). 

 There is therefore a différence in size of 5 mm. in the average 

 between the mainland and island birds — a différence which cannot 

 he overlooked when so small a bird is under considération. It is 

 noteworthy that the spécimens from the mainland with the largest 

 wing measurement ail came from lower Guinea, the average would 

 hâve been smaller if birds from upper Guinea had alone been mea- 

 sured. 



From this it will be seen that the name C. obscurus obscurus 

 must be restricted to Fernando Po birds or at anyrate to birds from 

 the islands in the Gulf of Guinea, as I am inclined to unité the bird 



