1918.] the Birds of the Anglo-Egyptian Sudan. 677 



1. Prinia mistacea mtstacea (see above). 



With a very pronounced seasonal plumage change, the 

 winter (October to March) birds being very bright rufous 

 and the summer (April to September) pale grey. Wing 

 46-52 ; tail in summer averages 50, in winter 60-62 mm. 



Distr. Abyssinia westwards through the Sudan to 

 Northern Nigeria and Gold Coast hinterland; probably 

 to Senegal, and in that case Drymoica superciliosa of 

 Swainson will be a synonym. 



D. murina Heuglin^ Ibis, 1869, p. 90 : N. Abyssinia, was 

 founded on a bird in summer plumage and is undoubtedly 

 a synonym. 



2. Prinia mistacea melanorhyncha (/). melanorhynchus 

 Jard. & Fraser, Contr. Oru. 1852, p. 60: Abomey). 



Birds from west African coastlands from Portuguese 

 Guinea to Southern Nigeria have, so far as we can see, 

 no plumage change. They resemble the summer birds of 

 P. m. mistacea., bnt are considerably darker and more richly 

 coloured. Wing 45-51 mm. 



Cameroon birds are intermediate between this form and 

 the next. 



3. Prinia mistacea tenella {Drymceca tenella Cabanis 

 in Von der Decken's Reisen, iii. 1869, p. 23 : Mombasa). 



This form has no plumage change and closely resembles 

 the last-named, but is ratlier larger : wing 48-55 mm. 

 Distr. East Africa and Uganda to the Belgian Congo. 



4. Prinia mistacea affinis {Drymoica affinis Smith, 

 Illustr. Zool. S. Afr., Aves, 1843, pi. 77: interior of 

 S. Afr.). 



With a pronounced seasonal plumage change correspond- 

 ing to that oi P.m. mistacea but reversed, the summer bein"- 

 October to March and the winter March to October. Flanks 

 very tawny in winter plumage. Larger : wing 48-55 mm. 



Distr. South Africa from N. Rhodesia and northern 

 Angola southwards. 



