84-2 Messrs. Sclater and Mackwoi'tli-Praed on [Ibis, 



Ave are inclined to suggest that the birds from the Island of 

 St. Thomas are a somewhat darker resident I'ace, while those 

 from southern Arabia are very noticeably paler and more 

 sandy in coloration. 



Ptilopachus petrosus brehmi. 



PtilopacJins fuscus brehmi Neum. Bull, B.O. C. xxi. 1908, 

 p. 68 : Jebel Melpes, i. e. probably Jebil Melbis, Kordofan. 



Ptilupachys fuscus apud Butler, Ibis, 1905, p. 388. 



[B. coll.] 9 Jebil Melbis Apl., 1 El Eiu Mch. Kor. 



This race of P. j^^trosus was described as above by 

 Neumann. Its range is not apparently the whole of 

 Kordofan, but only the northern portion. From the material 

 now available it is obvious at a glance that the four races of 

 this species already described are not sufficient. Two others 

 are easily recognisable in the Sudan. The first of these is a 

 bird rather nearer typical P. y>. ^je/rosws than P. j). brehmi, 

 but distinctly more rufous. The feathers of the crown are 

 redder ali^o, and with little of the grey edging found in 

 P. p. fuscus. A good deal darker bird than P. p. brehmi. 

 We name this 



/, Ptilopachus petrosus butleui, subsp. nov., 



and its range is apparently southern Kordofan and the Bahr 

 el Ghazul Province, except the eastern edge to the Gribingui, 

 where it was met with by Alexander. Type: c? , collected 

 by A. L. Butler at Buval, near Wau, Bahr el Ghazal, 

 29. 1. 1907. P.M. reg. no. 1916. 9. 20. 670. 

 Of this we have : — 



[B. coll.] 1 Haffali Feb., 1 Kojali Feb., 1 nr. Wau Jan., 

 1 Pongo river Mch. B.G.; and 2 from Khor Nabag, 

 Kordofan, presented by W. B. Halhead, I from the 

 Bahr el Ghazal by G. Blaine, and 1 from the 

 Gribingui river, Lake Chad territory, by Alexander. 

 According to Mr. Butler (Ibis, 1908, p. 259) it is a 

 common bird in the ironstone country. 



The second race we have to name is one from the Lado 

 Enclave, the extreme easterly portion of the Bahr el Ghazal 



