CONTENTS. / 



^. 



XXX. A Noiniiiiil List of the Birds at present known to 

 inhabit ISiam. By Count JSrLs Gildesstolpb, D.Sc, 

 F.M.B.O.U 735 



XXXI. A List of the Birds of the Anglo-Egyptian Sudan, based 

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

 and Capt, H. Lynes, ll.X., and Major Cuthbert Christy 

 ll.A.M.C. (T.E.). Bart IV. (concluded). Belecanidje— 

 Struthionidae. By W. L. Sclateii, M.B.O.U., and 

 C. Mackworth-Prakd, M.B.U.U. (Plates XVIII.) . 781 



XXXII. A Coutributioii to tlie Study of Nestling Birds. By 



CoLLiNGWooD Inqeam, M.B.O.U. (Toxt-tigures 1-17.) 856 



XXXIII. Notes on the Birds of North-East Cliihli, in North China. 



Part II. By J. D. D. La Toucue, CM Z.S., M.B.O.U. 880 



XXXIV. Some preliminary remarks on the Altitude of the 

 Migratory Elight of Birds, with special reference to 

 the Palaearctic litgiou. hy Col. B. Mkineutzhagkn, 

 D.S.O., M.B.O.U., E.Z.S 920 



XXXV. Obituary : Lieut. C. O. Finch-Davies 936 



XXXVI. Notices of recent Ornithological Publications: — 



Ijaldwin on Bird-bauding ; Bangs and Penard on new 

 Hawks ; Bannenuan on Congo Birds ; Chapman uu new 

 South American Birds ; Colliuge's recent papers on Economic 

 Ornithology; Cory on the Deudrocolaptine genus Stj)tor?iis ; 

 Dixon on the Wild Ducks of a City Park; Eiuwer on 

 the Giza Zoological Gardens ; Griunell's recent papers ; 

 J. H. Gurney's Ornithological Report; It. Gurney ou the 

 Black-headed Gull ; Harper ou a new Hedge-Sparrow ; 

 Hartert on the Palaearctic Birds; Kuioda on new Japanese 

 Birds; McGregor's list of the Geners, of Birds; Mathews on 

 Aiistialian Birds; Penard's recent papers ; Rowan and others 

 ou the eggs of the Conmion Tern ; Shufeldt on the Moukey- 

 entiug Eagle ; Stresemann and Sachtleben on the AVillow-Tit; 

 Witherby's Handbook of British Binls; The Auk; Avicui- 

 tural Magazine ; 'J'he Bombay Journal ; ' British Birds ' 

 Magazine; French Review of Ornithology; liivista Italiana 

 di Ornitologia ; Scottish Naturalist; List of other Ornitho- 

 logical Publicati(jn3 received 937 



XXXVII. Letters, Extracts, and Notes: — 



Letters frcini L. M. Looniis on the last phase of the sub- 

 species, and from O. V. Aplin on the Birds of Texel ; Special 

 Meeting ot the Union 964 



Index of Scientific Names 969 



Index of Contents 1019 



Titlepage ; Dates of Issue of ' The Ibis ' for 1920 ; List of M^bers ; 



Contents : List of Plates ; and List of Text-figures,. A 



y> 



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Communications intended for publication in * The Ibis ' should be addressed 

 to the Editor, 10 Sloane Court, Chelsea, S.W. 1. 



Members ai-c requested to inform tlie Secretary, Chief Police Office, 

 West India Docks, London, E. 14, of any change of Address, so that the 

 numbers of * The Ibis ' may reach them without delay. 



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