384 Letters, Extracts, Notices, fyc. 



XXXVIII.— Letters, Extracts, Notices, %c. 



We have received the following letters, addressed " to the 

 Editor" :— 



Buenos Ayres, 

 Jan. 28, 1890. 



Sir, — I wish to inform you that in the figure of Chatocer- 

 cus burmeisteri, published in ' Argentine Ornithology ' (vol. ii. 

 pi. xi.), there is a slight error. The two small stripes of 

 crimson-red, shaded with violet-blue, on the throat, are 

 represented as separated by an interval in the middle ; 

 whereas they are united there by two rows of smaller feathers 

 of the same colour, and in this manner form a bilobed half- 

 collar. 



At the point immediately under the beak there are some 

 small white feathers, like a beard. These are not shown 

 in the figure. 



Yours &c, 



H. BURMEISTER. 



Topclyffe Grange, Farnborough, 

 R.S.O., Kent. 

 Feb. 28, 1890. 



Sir, — Some time ago, when examining specimens of 

 Rollers for the purpose of writing a monograph of that family, 

 I found, on comparing examples of the White-necked Roller 

 (Coracias ncevia) from various parts of Africa, that there are 

 certainly two clearly separable forms : one which has the 

 crown rufescent or vinaceous pink, inhabiting Abyssinia, the 

 Upper White Nile, Somaliland, Senegambia, and the Niger 

 district ; and the other, which has the crown pale olivaceous 

 green, inhabiting the Congo, Angola, Benguela, Damaraland, 

 Mozambique, the Transvaal, and South Africa generally. 



I have not yet fully made out the geographical ranges of 

 these forms, but, so far as I can at present judge, the rufous- 

 crowned form is only found north of the equator, and the 

 olive-crowned form south of the equator. 



