650 Messrs. Sclater and Mackwortli-Praed on [Ibis, 



from C s. leucotis from nortliein Abyssinia by its darker 

 throat, more sharply defined white ear- coverts, and finer 

 barring of the mautle, Avhereas C. s. hilgerti is still darker 

 tlian C. s. erlangeri. The plate in the J. f. O. 1910, though 

 not perhaps as accurate as might be wished, nevertheless 

 gives a very fair idea of the differences between the three 

 forms. With regard to C. s. jebelensis Mearns, from 

 Gondokoro, we cannot ourselves make out any distinction 

 between it and C. s. erlangeri Zedl. 



Mearns does not in liis description compare the two forms 

 though he mentions the plate in the J. f. O. Our present 

 good series from the upper Nile agrees very well with the 

 figure of C s. erlangeri there depicted, and we can find 

 nothing in Mearns' description incompatible with that of 

 Zediitz. We must therefore consider Mearns' name as a 

 synonym. The race differs from C. s. nigricollis, as we 

 have indicated under that species. 



Colius striatus nigricollis. 



Colius nigricollis Vieill. Nouv. Diet. d'lfist.Nat. vii, 1817, 

 p. 378 : Malimbe, Congo ; Reichw. V. A. ii. p. 203. 



Colius leucotis nee Riipp., Butler, Ibis, 1909, i). 86. 



[B. coll.] 2 Kojali Feb. B.G. 



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



This is an extension of the known range of this race : it is 

 found through Portuguese and French Congo to Cameroon, 

 and, like many other species, enters our limits by way of the 

 Welle valley. Its distinction from the upper Nile race, 

 C. s. erlangeri. is obvious at a glance, owning to the much 

 deeper and greater extent of black on the throat, the iieavier 

 barring of the chest, and the complete lack of white on the 

 ear-coverts. 



Colius macrourus macrourus. 



Lauius macrourus Linn. Syst. Nat. 12tli ed. 1766, p. 134: 

 Senegal. 



Colius macrourus (Linn.) ; Reichw. V. A. ii. p. 210 ; 

 Butler, Ibis, 1905, p. 356, 1908, p. 243. 



