228 Mr. A. L. Butler on the 



87. Argya acaci^e (Licht.). 



a. ? . Khor Dahaiid, Suakin, 22. 3. 06. 



Lichtenstein^s Desert-Babbler is common in tlie scrub 

 along the plain between the hills and the sea south of 

 Suakin. It does not ascend the hills at all, so far as my 

 observation goes. 



88. Crateropus plebeius (Biipp.). 

 a. S. Buval, 28. 1.07. 



These Babbling-Thrushes were common between Wau 

 and Chak Chak. They were as noisy and excitable as most 

 birds of their genus. I caught and released a newly fledged 

 bird at the Khor Gitti on Jan. 30th. 



89. Pycnonotus tricolor minor Heugl. 

 a. J . Bor, Feb. 1906. 



/>. ^. Bahr-el-Ghazal River, 12. 1.07. 



This Bulbul was common along the Bahr-el-Ghazal River 

 and from Meshra to Chak Chak. I am not clear as to the 

 point where it replaces P. arsinu'e on the White Nile. I am 

 indebted for the specimen from Bor to M. de Vilmorin, 



90. Eremomela elegans (Heugl.). 



a. ?. Chak Chak, 15.2.07. 



b. S. Dug Dug, 19.1.07. 



These daintily-coloured little Warblers were common 

 both among scattered trees in the open country between 

 Meshra and Wau and in the forests between Wau and Chak 

 Chak. 



91. Camaroptera brevicaudata (Rvipp.). 



Common in the Bahr-el-Ghazal Province between Ayum. 

 and Chak Chak. 



92. Sylviella brachyura Lafr. 

 a. (^ . Gameiza, 8. 4. 07. 



This little bird was common in the trees on the open 

 alluvial plain inland from Meshra, but I never saw it after 

 reaching the wooded ironstone country. 



