326 Dr. E. B. Sharpe oji 



with the season of the year. The young bird has yellowish- 

 brown feet and a yellowish bill and is altogether greener 

 above and below, but the changes of plumage from youth to 

 age have not yet been described. 



Hylia poensis of Alexander cannot be separated from the 

 continental form^ as, indeed, he himself has also found out. 



Prinia mystacea. 



Prinia mystacea Riipp. ; Sharpe, Hand-1. B. iv. p. 240 ; 

 Reichenow, Vog. Afrikas, iii. p. 590. 



Nos. 34, 89, 253, 1501, 1540, 1858. S ad. et juv. ; 256, 

 1443, 1540, 1558, 1561. ? ad. et juv. River Ja, Feb. 1903 

 to July 25, 1906. 



Nos. 2054, 2248, 2417. S ; 2051, 2485. ? ad. Bitje, 

 Nov. 1906, to April 22, 1907. 



BURNESIA BAIRDI. 



Burnesia bairdi (Cass.) ; Sharpe, Hand-L B. iv. p. 242. 



Prinia bairdi Reichenow, Vog. Afrikas, p. 597. 



Nos. 1107, 1112, 1132. ? ad. et juv. Zima Country, 

 Oct. 11-14,1905. 



Nos. 1291, 1398, 1490. ? ad. ; 1603, 1675, 1738. S ad. 

 et juv. River Ja, Jan. to April 1906. 



No. 2105. ? ad. Bitje, River Ja, Nov. 29, 1906. 



No. 2191. S ad. „ „ Jan. 23, 1907. 



Nos. 2450, 2480. S ad. et imm. Bitje, River Ja, April 

 12-21, 1907. 



No. 2538. ? ad. Bitje, River Ja, May 24, 1907. 



I perceive that a mistake, as sometimes happens, has taken 

 place in my '•' Key to the Species " of Bwmesia in the ' Cata- 

 logue of Birds ' (vii. p. 203) ; B. bairdi should be in the 

 second section of the genus, with a black sub-terminal bar 

 on the tail-feathers. 



The young bird differs greatly from the adults, being, 

 uniform below and not barred, while the spots on the wing- 

 coverts are rufescent instead of white. The under surface is 

 ashy, whiter on the centre of the breast and abdomen. The 

 lower mandible is yellowish in the young bird. 



