— 289 — 



olackish ieathers of which are tipped with pale rufous, but thèse 

 feathers become black before the head changes from chestnut to 

 black. In one practicallv adult niale in Sir Frederick's collection 

 two or three of the chestnut feathers of the immature remain and 

 may be seen just above the vellovv mantle-band. 



Ciniia/nopteryx tricolur interscapnlaris differs from C . triculor 

 tricolor, as alreadv pointed out bv Ogilvie-Grant {Trans. Znol. 

 Soc, 19 10, p. 274). The chief characters being the narrower 

 vvidth of the vellow mantle-band and the black of the head being 

 carried onto the nape. 



Nicator vireo. 



Nicator vireo Cabanis, J. f. O., 1876, p. 333. — Type locality : 

 Chinchoxo (Loango). 



A single example of this rare shrike was obtained by Dr. Christy 

 at Poko on the Uelle River, 26-6-14. The bird is known from the 

 Belgian Congo, Cameroon and North Angola. 



Sigmodus rufiventris mentalis. 



Signiodus mentalis Sharpe, Journ. Linn. Soc. Zool., XVII, 1884, 

 p. 425. — Type locality : Sassa (N. E. Belgian Congo). 



A fine séries of 14 birds coUected by Dr. Christy ail at the same 

 place : Poko on the Uelle River, shows that Bohndorf's Red- 

 billed Shrike must imquestionablv be kept up — but as a subspecies 

 of S. rufiventris. Moreover the new séries shows that one of the 

 chief characters hitherto assigned to S. mentalis — i. e. having only 

 a very few feathers of the chin bluish-grev instead of the entire 

 chin as in S. rufiventris — cannot be maintained. The séries shows 

 a complète gradation of the chin feathers, some spécimens having 

 only the feathers at the actual base of the bill grey while in others 

 the entire chin is grev. 



The main characters of S. r. mentalis are in the darker rufous of 



