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



the blue colour ou the wiug-coverts is lial)le to considerable 

 variation. Sometimes tlie transverse bars are blue and 

 black; in other birds white, blue, and black, and ' find 

 that when the latter is the case, the pattern of the Avhole is 

 changed, tlie black Ijars being more apart. Now and then, 

 but as it seems rarely, tiny white spots can be detected at 

 the end of some of the coverts. 



XXXI. — A List of the Birds of the A7iglo-Egyptian Sudan^ 

 based on the Collections of Mr. A. L. Butler, Mr. A. 

 Cltapman and Capt. H. Li/nes, R.N^., and Major Cuth- 

 bert Christy, R.A.M.C. {T.F.). Part III. Picid.e— 

 Sagittarhd^. By W. L. Sclater, M.B.O.U., and 

 C. Mackworth-Praed, M.B.O.U.* 



(Plate XIX.) 



This, the third portion of the Birds of the Sudan, contains 

 the Picarian and Accipitrinc liirds, and we trust that the 

 next part will complete this somewhat lengthy paper. 



In working out this part we have found Mr. Claude 

 Grant's unfinished account of the birds of the Coscns 

 collection from British East Africa (Ibis, 1915, pp. 1-76, 

 235-316, 400-473) most useful, as he paid special attention 

 to the racial forms of many of the species met with, and 

 we have very frec^uently referred to his work. We hope 

 that he may soon return to this country and complete his 

 task which was interrupted by military duty. 



For the convenience of readers we have reprinted the 

 map of the Sudan, published in the first portion of our 

 paper. 



As befoi'e, the names of the Provinces into which the 

 Anglo-Egyptian Sudan is divided for administrative purposes 

 have been added to the localities cited. These have been 

 abbreviated as follows : — 



Ber. = Berber Province, R.S. = Red Sea Province, Kas.= 



* Contiuued from Ibis, 1918, p. 721. 



