1921.] Birds of Tasso and aojoining Islands. 265 



XIV. — The Birds of Tasso and adjoininf/ Islands of the 

 Rokelle River, Sierra Leone. By Willoughby P. Lowp], 

 M.B.O.U. With Notes hy David A. Bannerman, B.A., 

 M.B.O.U. 



(Text-figiire 3.) 



Preface. — By D. A. Bannerman, 



The collection of birds obtained by Mr. W. P. Lowe in 

 Sierra Leone in the early s])ring of 1920 comprises 207 

 skins, representing 118 species and subspecies. As Mr. Lowe 

 has explained in his introductor}' remarks, the collection was 

 made principally on the three islands — Tasso, Mayahgba, 

 and Yatward — M'hich lie in the wide mouth of the Rokelle 

 River ; these islands have never been explored, and it has 

 therefore been thought advisable to give a complete list of the 

 birds known to inhabit each. The position of these islands will 

 be seen by referring to the map (text-figure 3) which has 

 been specially prepared by Lieut. Mansergh, R.N., of H. M.S. 

 ' Dwarf.' During his comparatively short stay in Sierra 

 Leone, Mr. Lowe was successful in adding a nvimber of 

 species to the list of Sierra Leone birds hitherto unrecorded 

 from the ( !olony. All were obtained, unless the contrary is 

 noted, viz, : — Ortygosjnza atricollis ansorgei, Anticltromus 

 miimtns miiuifus, f Cisticola terrestris subsp. undetermined, 

 Cisticola rufopileata rufopileata, Penthohea frontalis, Brady- 

 ornis murinus modest us, Batis senegalensis togoensis, Tchitrea 

 viridis viridis, Riparia riparia riparia, Clamator glandarius, 

 Centropus francisi, Micropus ceqxiatorialis loivei, subsp. nov., 

 Lophoceros nasutus nasi/tus, Bi/canisies fstidator, Bubo 

 africanus cinerascens, *Aquila icahlhergi, * Spizaetus coronatus, 

 *Cuncuma vocifer, Circaetus cinereus, *Pandion haliaetus 



* Not obtained, but identified without a doubt. 



t A single specimen only was obtained ; recently we have received a 

 further single specimen in breeding-plumage from Miijor Scovil, R.A. 

 The bird is most nearly allied to C t. eximia, Heugl., and, when a series 

 are obtained, will probably prove to belong to an undescribtd race. 



SER, XI. VOL. III. T 



