1881.] BIRDS FROM EASTERN AFRICA. 581 



89. NiCATOR GULARIS. 



Nicator gularis, Fiusch & Hartl. Vog. Ostafr. p. 360 ; Cab. J. f. O. 



1878, p. 225 ; Fischer & Reicheuow, tom.cit. p. 259 ; Fischer, torn, 

 cit. p. 277. 



LaiDO. 



This species ranges from Lamo to the Zambesi. 



90. Malaconotus icterus (Cuv,). 



Meristes olivaceus, Finsch & Hartl. Vog. Ostafr. p. 361 ; Fischer 

 & Reichenow, J. f. O. 1878, p. 259; Fischer, tom. cit. p. 275; 

 id. J. f. O. 1879, pp. 287, 300; Fischer & Reicheuow, tom. cit. 

 p. 346; Gurney, Ibis, 1881, p. 126. 



Lamo ; Usambara mountains ; Ugogo ; Dar-es-Salaam. 



This species ranges throughout Africa south of about 16° N, lat. 



Lanius olivaceus, Shaw, Gen. Zool. vii. p. 330, refers to a distinct 

 species well figured by Levaillant, Ois. d'Afr. ii. p. 75 ; so that the 

 title olivaceus, Vieill., cannot be here employed. 



91. Prionops talacoma. 



Prionops talacoma, Smith, Finsch & Hartl, Yog. Ostafr. p. 365 ; 

 Sharpe, Cat. B. iii. p. 321. 



Ugogo; Dar-es-Salaam. 



It ranges from Ugogo southward to the Transvaal, and from thence 

 through the northern portion of South Africa to Damaraland and 

 Angola. 



92. SiGMODUS TRICOLOR. 



Prionops graculinus, Fiusch & Hartl. tom. cit. p. 368 ; Sharpe, 

 P. Z. S. 1873, p. 714; Cab. J. f. O. 1878, p. 224 ; Fischer & 

 Reichenow, tom. cit. p. 2.i9 ; Fischer, tom. cit. p. 275 ; id. J. f. O. 



1879, p. 287; Fischer & Reichenow, tom. cit. p. 347. 

 Siffmodus tricolor (Gray), Sharpe, Cat. B. iii. p. 325. 

 Sigmodus graculinus, Sharpe, loc. cit. ; Nicholson, P. Z. S. 1878, 



p. 357. 



Pangani ; Usambara hills ; Usambara mountains ; Dar-es-Salaam. 



In my opinion S. tricolor and (S. graculinus are not specifically 

 distinct. They both inhabit the same country north from the 

 Zambesi ; the former is known to range to Pangani, and the latter 

 to Mombas. The white bar on the wing is a very variable cha- 

 racter ; and although present in nine specimens from the above 

 localities, it is reduced in one from Pangani to small, almost obso- 

 lete spots, only visible on the fourth and seventh primaries. Four 

 specimens, collected by Dr. Kirk at Dar-es-Salaam, have the white 

 bar on the wing clearly defined, while another specimen from the 

 same locality, presented to me by the late Mr. E. C. Buxton, has 

 no white on the wing, and is a typical example of S. graculinus. 



I can detect no difference in the colouring of the remainder of the 

 plumage, nor in any of the measurements. 



