1921.] Birds of Tasso and adjoining Islands. 
265 
XIV .—The Birds of Tasso and adjoining Islands of the 
Rokelle River , Sierra Leone. Bv Willoughby P. Lowe, 
M.B.O.U. With Notes by David A. Bannerman, B.A., 
M.B.O.U. 
(Text.figure 3.) 
Preface. —By D. A. Bannermau. 
The collection of birds obtained by Mr. W. P. Lowe in 
Sierra Leone in the early spring of 1920 comprises 207 
skins, representing 118 species and subspecies. As Mr. Lowe 
has explained in his introductory remarks, the collection was 
made principally on the three islands—Tasso, Mayahgba, 
and Yatward—which lie in the wide mouth of the Bokelle 
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.X., of H.M.S. 
4 Dwarf.’ During his comparatively short stay in Sierra 
Leone, Mr. Lowe was successful in adding a number of 
species to the list of Sierra Leone birds hitherto unrecorded 
from the Colony. All were obtained, unless the contrary is 
noted, viz. :— Ortygospiza atricollis ansorgei , Antichromus 
minutus minutns , f Cisticola terrestris subsp. undetermined, 
Cisticola rufopileata rufopileata , Rentholcea frontalis , Brady- 
ornis murinus modestus , Batis senegalensis togoensis , Tchitrea 
viridis viridis , Riparia riparia rip aria, Clamator glandarius , 
Centropus francisi, Micropus cequatorialis loivei , subsp. nov., 
Lophoceros nasutus nasutus , Bycanistes fistidator , Bubo 
africanus cinerascens, * Aquila wahlbergi , *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 M<:jor 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 undescribed race. 
SER. XI.-—VOL. III. 
T 
