642 Messrs, Sclater and Mackworth-Praed on [Ibis, 



Coccystes jacobinus (Bodd.) ; Heichw. V. A. ii. p. 78 ; 

 Butler, Ibis, 1908, p. 245. 



[B. coll.] 1 Khartoum Aug.; 1 Malakal June, U.N.; 

 2 Mongalla " sumuier," 1 Bor May, Mon. 



[Chr. coll.] 1 Terabura Apl. B.G. 



Hartert (Nov. Zool. xxii. 1915, p. 254) has recently 

 suggested that it might be possible to recognize the African 

 bird as distinct from that of India, in which case the riame 

 of our bird should be Clamator jacobinus pica {Cuculus pica 

 Hempr. & Ehr. Symb. Phys. 1828, fol. r. : Ambukol in 

 Dongola). 



We have measured the wings of the large series of Indian 

 and African birds in the British Museum, and our results 

 are almost exactly the same as those of Hartert, the African 

 birds averaging 154, the north Indian 149, the south Indian 

 144, and the Singalese 138. It" these slight differences are 

 considered to be sufficient ground for doing so we must 

 recognize three or four races, but there is no other tangible 

 difference. 



Butler states that this Cuckoo Ijreeds near Khartoum, and 

 that he believes Aryya acacia is the probable foster-parent. 



Pachy coccyx validus. 



Cuculus validus Keiclnv. Orn. Centralb. 1879, p. 139 : 

 Mutiiuiii, Tana river, B.E.A. 



[Chr. coll.] 1 Yanibio, 2 Mt. Baginzi Mch. B.G. 



This remarkal)le Cuckoo is an addition to the Sudan 

 fauna. It was met with by Emin at Tingasi on the upper 

 Welle, but its occurrence in the Bahr el Ghazal extends its 

 range consider;il)ly fartliei' northwards, 



Cuculus canorus. 



Cuculus canorus Linn. Syst. Nat. 10th ed. 1758, p, 110 : 

 Europe; Butler, Ibis, 1905, p. 356, 1908, p. 245, 1909, p. 87. 



[B, coll,] 1 Roseires Sept. 13, Sen, ; 1 Gedaref Apl. 21, 

 Kas.; 5 Khartoum July 24-31 Apl, 19. 

 [Chr. coll,] 1 Mt. Baginzi Mch. B.G. 

 Two of these Cuckoos have distinctly finer barring on the 



