— 36i — 



There are two forms of S. caniceps in Africa both confined to 

 the West Coast : 



1. — SiGMODUS CANICEPS CANICEPS. 



Si^modus caniceps Bonap., Consp., I, 1850, p. 365. — Butri 

 River, Gold Coast. 



Range. — Sierra Leone, Libéria, Togoland, Gold Coast. 



Distinguising characters. — Upper-parts black, crown bluish- 

 white, underparts white except belly and under tail-coverts which 

 are pale rufous-buff. 



2. SiGMODUS CANICEPS HARTERTI. 



et. supra. 



Range. — S. Nigeria. 



Distingîtishing characters. — Crown deeper bluish-grey, the 

 grey completely encircling the eye, belly slightly paler. Size 

 slightlv smaller, wing 112-IJ3 mm. in the 3 spécimens examined. 



In Cameroon, Gaboon and the Belgian Congo 5. caniceps is 

 replaced by another species S. riifiventris of which there are two 

 races recognised : 



1. — SiGMODUS RUFIVENTRIS RUFIVENTRIS. 



Signiodus riifiventris Bonap, Rev. et Mag. Zool., 1853, p. 441. — 

 Gaboon. 



Range. — Cameroon and Gaboon to the mouth of the Congo. 



2. — SiGMODUS RUFIVENTRIS MENTALIS. 



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

 p. 425. — Sassa. N. E. Belgian Congo. 



Range. — N. Belgian Congo, eastwards to Semliki Valley and 

 Niam-Niam country. 



