1920.] the Birds of the Anglo-Egyptiun Sudan. 843 



bordering it, and probably tlie Nile Province of Uganda. 

 This is a mucli darker bird than the last and is very close to 

 P. p. florentite Grant from British East Africa, but it is 

 distinguished by a more rufous tinge on the back, not grey- 

 brown as in that race. This \\e name 



Ptilopachus petrosus ladoensis, subsp. nov. 



Type from Mvolo, close to the boundary between the Bahr 

 el Ghazal and Lado Enclave, June 1905, presented by Major 

 H. Bray, B.M. reg. no. 1909. 8. 7. 120. 



Hartert has shown (Nov. Zool. xxiv. p. 276) that the 

 name Tetrao petrosus of Gnielin refers to this species and 

 not to the Barljary Partridge. The races of P. p. petrosus 

 then are : — 



1. P. p. PETROSUS. 



Tetrao petrosus Gmel. Syst. Nat. i. pt. 2, 1789, p. 758 : 



Gambia (ex BufTon, ex Stibbs). 

 Range. Senegal to Northern Nigeria and the Shari 



region. 



2. P. p. BREHMi Neum. oj?. cit. 

 Range. Northern Kordofan. 



3. P. p. MAJOR Neum. ibid. 

 Range. Northern Abyssinia. 



4. P. p. BUTLERI. 



Range. Bahr el Ghazal westwards to Gribingui River. 



5. P. p. LADOENSIS. 



Range. Lado Enclave and surrounding districts. 



6. P. p. FLORENTINE. 



O.-Grant, Bull. B. O. C. x. 1900, p. cvii : Gessema, 



B.E.A. 

 Range. British East Africa. 



Francolinus erckeli peiitoni. 



Francolinus erckeli pentoni M.-Praed, Bull. B. 0. C. xl. 

 1920, p. 141 : Erkowit. 



Francolinus erckeli apud Butler, Ibis, 1908, p. 259. 



[B. coll.] 7 Erkowit Mch. R.S. 

 [C. & L. coll.] 6 Erkowit Apl. R.S. 



