630 Messrs. Sclater and Mackworth-Praed on [Ibis, 



Piscus excubitorius princeps. 



Fiscus excubitorius princeps (Cab.) ; Sclater in Shelley's 

 B. A. V. p. 265. 



Fiscus excubitorius Butler, Ibis, 1905, p. 327, 1908, 

 p. 225, 1909, p. 80. 



[B. coll.] 1 Taufikia Mch. U.N. : I Mongalla summer; 

 1 Atwot, 1 near Rumbek Jan., 1 Chak Chak Feb., 

 3Doleiba May, B.G. 

 [C. & L. coll.] 2 south o£ Jebelein Jan. W.N. ; 1 White 



Nile lat. 10^° N. Jan. U.N. 

 The birds from Ruwenzori identified by Ogilvie-Grant 

 as F. intercedens Neum. appear to be identical with this 

 race, whose range extends from the White Nile valley 

 to Uganda. 



Enneoctoniis coUurio. 



Enneoctunus collurio (Linn.); Sclater in Shelley's B. A. v. 

 p. 281. 



Lanius collurio Butler, Ibis, 1905, p. 328. 



[B. coll.] 6 Khartoum Aug.-Oct. 



The earliest date is the 13th of August — a young bird, 

 but, of course, fully fledged; others from the 23rd onwards. 

 These dates seem early for winter visitors, but it must be 

 remembered that the Red-backed Shrike leaves its breeding- 

 places rather early. 



Enneoctonus gubernator gubernator. 



Enneoctonus gubernator (Hartl.) ; Sclater in Shelley's 

 B. A. v. p. 285. 



[Chr. coll.] 5 Yei Nov. Dec. L.E. 



A Shrike obtained by Alexander near Lake Chad has a 

 much paler grey head and appears to be referable to E. g. 

 striimpelli Reichw. from the interior of Cameroon. But 

 the birds from the Gold Coast hinterland appear to be indis- 

 tinguishable from those of the upper Nile, although the 

 paler form intervenes as far as locality is concerned. 



