710 Messrs. Sclater and Mackwortli-Praed on \\h\?>, 



from the typical race of West Africa by the presence of a 

 white frontal band in the female. 



Tchitrea viridis, 



Tchitrea viridis (St. Miiller) ; Reichenow, V. A. ii. p. 504. 



Terpsiphone cristata (Gm.) ; Butler, Ibis, 1905, p. 34-1, 

 1908, p. 237, 1909, p. 83. 



[B. coll.] 5 Roseires May, July, Sept.; 1 Jebel Maba 

 A pi. Sen.; 2 Renk Mch. May, 1 Malakal Nov., 

 3 Bahr el Zeraf June, U.N. ; 4 Wau Jan. ApL, 

 1 Kojali Feb., 5 Tembura Mch. B.G.; 1 Shambe Jan., 

 3 Mongalla Jan. July, 1 Gigging, 1 Kenisa Jan., 



1 Sheik Tombe Jan. Mon. ; 1 nr. Rejaf Apl. L.E. 



[C. & L. coll.] 3 Kamisa Dec. Sen.; 3 White Nile 



91Q to 10|« N.L. Jan. Feb. U.N. 

 [Chr. coll.] 8 Mt. Baginzi Mch., 5 Meridi Jan. Feb., 



2 Tembura Apl., 1 Wau, B.G. ; 4 Yei Nov. Dec. 

 L.E. 



The adult males of Paradise Flycatchers from the Bahr el 

 Ghazal have grey under tail-coverts, and are somewhat more 

 richly coloured with more gloss below. They appear to 

 approach the race T. v. duchaillui Cass, from Gaboon, and 

 there are no wholly white-backed males among this series, 

 though there is one example with the back intermingled 

 black and white. So far as we know T. v. duchaillui is the 

 only race which ever gets a completely black back in the 

 adult. 



The birds from the Nile valley proper and Sennar have 

 white under tail-coverts in the adult males, and the red- 

 backed, white-tailed birds, which are the predominant form 

 among the Bahr el Ghazal series, are quite absent, the 

 white-backed, white-tailed adults being abundant. This 

 we take to be identical Avith the typical West African race 

 (7^. V. viridis). They do not resemble the Abyssinian form, 

 T. V. ferreti, which appears to moult straight from the 

 short-tailed young bird into the white adult, whereas in the 

 Sudanese series we have the intermediate long-red-tailed, 

 red-backed stage. 



