69 [Vol. xxi. 



AsTUR RIGGENBACHI, sp. 11. 



Adult male. Similar to A. sphenurus, RUpp., but -with the 

 upperside much darker and like that o£ A. soloensis, Lath. 

 The tliroat and upper breast uniform dark vinous-buff with- 

 out white bars; the lower breast, belly, thighs, and under 

 wing-coverts barred with vinous-buff and white; and the 

 under tail-coverts uniform white. Wing 177 mm. ; tail 

 157 mm. ; tarsus 45 mm. 



Nearly adult female. Differs from the adult male in having 

 the throat and upper breast barred with white, the white 

 bars becoming well-defined and broader on the lower breast 

 and belly ; the ground-colour much darker than in A. sphe- 

 nurus. There are some dark brown patches on the under 

 wing-coverts. Wing 185 mm. ; tail 169 mm. ; tarsus 

 47 mm. 



Obs. Except as regards the different colour of the under 

 wing-coverts and secondary quills, in which the white at the 

 basal part is much reduced or absent, this new species more 

 nearly resembles A. soloensis than A. sphenurus. 



Hab. Senegal. 



Type : $ . Gassam, east o£ Thies, 7. ix. 07 : F. W. Rig- 

 genbach coll, 



CHiETURA SABINI OGOWENSIS, Subsp. n. 



Adult male and female. Similar to C. s. sabini, Gray, 

 from Sierra Leone, but much smaller. Wing 115-126 mm., 

 as compared with 132 mm. in C. s. sabini. 



Hab. Ogowe and Aruwimi Rivers, Loango and Fer- 

 nando Po. 



Type : (J . Lake Onange, Ogowe River, 17. vii. 07 : 

 W. J. Ausorge coll. 



Obs. The wings of eight specimens from Fernando Po 

 (British and Tring Museums) measure 115-121 mm. ; of nine 

 specimens from the Ogowe (Tring Museum) 116-122 mm. ; 

 of two specimens from the Aruwimi (British and Tring 

 Museums) 116 and 120 mm. respectively. Two specimens 

 from the Ogowe measure 124 mm. and another 126 mm. 



