19 1 8.] the Birds of the Anglo-Egyptian Sudan. 637 



We still maintain that it is impossible to recognize any 

 satisfactory races of this Shrike from south, west, or east 

 Africa. There is a certain amount of variation in tlie depth 

 of tone of the colour of the back ; the darkest birds are found 

 in Angola, Belgian Congo and Uganda, and the tropical coast- 

 belt of British East Africa, while lighter-coloured birds are 

 found from Senegal to Northern Nigeria, Bahr el Ghazal, 

 and north and central East Africa. The birds from South 

 Africa are also of the paler type, but there is much variation 

 individually, and possibly races may be in the process of 

 formation, but we propose to leave them united for the 

 present. 



Tschagra senegala sudanensis, subsp. n. 



[B. coll.] 2 Roseires July, 1 Famaka May, Sen. ; 1 Bahr 



el Zeraf Jan., 1 Khor Filus June, TJ.N. ; 1 Shambe 



Dec, 3 Bor, 1 Abu Kika May, Mon. 

 [C. & L. coll.] 1 nr. Tonga Feb., 2 White Nile lat. 9^° N. 



Feb., 1 mouth of Zeraf river Feb., 1 Lake No Mch. 



U.N. 



The discrimination of the races of the Tschagra Shrikes 

 of north-eastern Africa have caused us a good deal of 

 trouble. There is a very good series in the British 

 Museum, and we have after considerable hesitation decided 

 that three races should probably be recognized, and that 

 Neumann's name T. s. erlangeri cannot be used for the 

 Sudanese bird. We are therefore compelled to find a new 

 name for the form. The following is a brief synopsis of the 

 races from this part of Africa : — 



Tschagra senegala habessinica (Hempr. &Ehr.) : Abys- 

 sinian coast-lands. 



We regard Laniarius blanfordi Sharpe as a synonym. A 

 smaller race, wing averaging 78 mm. Colour of t.he back 

 distinctly brown, often tinged with rufous ; below grey, 

 sometimes a slight wash of olive, but never any rufous. 



Range. The northern districts of Abyssinia and Eritrea, 



