642 Messrs. Sclater and Mackworth-Praed on [Ibis, 



Family SvLViiDiE. 



Agrobates galactotes galactotes. 



Agrobates galactotes galactotes (Temm.) ; Hartert, Vog. 

 pal. Fauu. p. 603. 



Aedon galactodes Butler, Ibis, 1905, p. 836, 1908, p. 231. 

 [B. coll.] 1 Erkowit Mcii. R.S. ; 1 Gedaref Apl. Kas. ; 



5 Khartoum Apl. May. 

 [C. & L. coll.] 2 Kamisa Dec. Sen. 



Agrobates galactotes minor. 



Agrobates galactotes minor (Cab.) ; Hartert, Vog. pal. 

 Fauu. p. 606. 



Aedon galactudes apud Butler, Ibis, 1909, p. 397. 



[B. coll.] 1 Khor Arbat May, 2 Erkowit Mch., 1 Jebel 

 Okokreb ^Icli. R.S. ; 1 Eiu-el-Lueiga on the Rahad 

 river May, B.N. 



[C. & L. coll.] 2 Sinkat Mch. R.S.; 2 Kamisa Dec, 

 1 Singa Dec. Sen. 

 ' There are undoubtedly two distinct races of the Rufous 

 Warbler in the Sudan, the larger typical A. g. galactotes, 

 which is a winter migrant only, and the smaller A.g. minor, 

 a resident form in northern Abyssinia and Somalilaud, and 

 the Sudan westwards to Northern Nigeria and the Gold Coast 

 hinterland. 



From the latter locality Alexander described his Sylvia 

 olivia, Bull. B.O. C. xxiii. 1908, p. 15, which is a synonym. 



The measurements of the wings of the two forms are as 

 follows : — 



A. g. galactotes: S 88, 90 ; ? 85, 85, 85, 84-, 84, 84, 84. 



A. g. minor: ^ 83, 83, 82, 82, 82, 82, 82, 80, 80, 80, 78; 

 ? 78, 78, 79. 



The measurements, as will be seen, are remarkably 

 constant and aflPord an easy method of separation. 



INIr. Butler did not distinguish between the two forms o£ 

 the Rufous Warbler, but he found the smaller one breeding 

 at Khor Arbat on 13 May. 



