1918.] the Birds of the Anglu-Egijptian Svdan. 473 



t Passer nikersoni* Madarasz, Ann. Mus. Nat. Hung. 

 June 1911, p. 341 : between Dinder R. and Blue Nile. 



Passer albiventris Madarasz, Ann. Mus. Nat. Hung. June 

 1911, p. 342 : Sudan. 



Range. From Eritrea throughout the region of the Blue 

 and White Niles to the western Sudan and N. Nigeria. 



Separable from any other race by its considerably whiter 

 throat and underparts (see J. f. O. 1911, pi. 1). Wing 82- 

 86 mm. In the western limits of its range it merges into 

 P. g. griseus, and the name P. diffusus theirryi Reichw. was 

 probably given to the intermediate form. Birds from the 

 Bahr el Ghazal are also duskier, and are probably inter- 

 mediate with P. g. griseus or P. g. Uganda. 



The Museum is unfortunately very deficient in material 

 from Senegal, and it is possible that fresh skins may show 

 the Senegal bird to be the same as the Eritrean form. In 

 that case this form would become P. g. griseus, and P. occi- 

 dentalis of Shelley would stand for the race from the rest of 

 West Africa. 



We have no specimens so small as Passer nikersoni of 

 Madarasz, and are inclined to think it will prove to be 

 a young bird of this race. 



6. Passer griseus neumanni. 



Passer griseus neumanni Zedlitz, O. M. 1908, p. 180 : 

 Salamona. 



Range. Sandy coast region of Somaliland, northwards to 

 Eritrea. 



Differs from P. g. griseus in having somewhat lighter 

 underparts, though not so light as in P. g. eritrece. They 

 have, however, especially on the under tail-coverts, a dis- 

 tinctly yellowish tinge. Wing 82-86 mm. 



The Museum has examples from Somaliland collected by 

 Lort Phillips and Gillett. 



Of the above-mentioned races, P. g. eritrece and P. g. neu- 

 manni are easily distinguishable ; P. g. diffusus fairly so ; 



* 7iikerso7ii is a lapsus calami for nickersoiii. Nickersou was Governor 

 of the Seiinar Province, and was killed by a fall from bis borse (A. L. B. 

 in litt.). 



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