1921.] 
Letters, Extracts, and Notes. 
567 
List of other Ornithological Publications received. 
Count Arrigoni degli Oddi. Reprints of nine recent papers. 
Gurney, J. H. Ornithological Notes from Norfolk for 1920. (Brit. 
Birds, xiv. pp. 242-252.) 
Riley, J. H. Four new Birds from Celebes and Five new genera of 
Birds. (Proc. Biol. Soc. Washington, vol. 34, pp. 51-58.) 
Witherby (Edited by). A Practical Handbook of British Birds. 
(Pt. x.) 
Auk. (Yol. xxxviii. no. 2.) 
Avicultural Magazine. (Yol. xii. nos. 3-5.) 
Bird-Lore. (Vol. xxiii. no. 2.) 
Bird Notes. (Vol. iv. nos. 3-4.) 
British Birds. (Yol. xiv. nos. 11-12.) 
Brooklyn Museum Quarterly. (Jan. 1921.) 
Canadian Field Naturalist. (Vol. xxxiv. no. 8.) 
Condor. (Yol. xxiii. no. 2.) 
Emu. (Yol. xx. no. 4.) 
Fauna och Flora. (1921, pt. 2.) 
Gerfaut. (Yol. xi. fasc. 1.) 
Irish Naturalist. (Yol. xxx. nos. 4-5.) 
Jaarbericht Club van Nederlandsche Vogelkundingen. (Vol. xi. pt. 1.) 
Journal fur Ornithologie. (Vol. 69, part 2.) 
L’Oiseau. (Yol. ii. nos. 3-4.) 
Ornithologische Monatsberichte. (Yol. 29, nos. 5-6.) 
Revue Fran^aise d’Ornithologie. (Nos. 144-145.) 
Scottish Naturalist. (Nos. Ill, 112.) 
South Australian Ornithologist. (Yol. vi. nos. 1-2.) 
XXX.— Letters , Extracts , and Notes. 
Plumages of Nestling Owls. 
Sir, —In the April number of 4 The Ibis J ( antea , p. 348) 
Mr. Bonhote refers to four plumages of the young Eagle- 
Owl which he had described in the 4 Bulletin B. O. C/ 
(vol. xxvii. pp. 82-83). The question is of some import¬ 
ance, as it involves the number of generations of plumage. 
[ should therefore like to point out that I cannot agree with 
Mr. Bonhote that the Eagle-Owl has three generations of 
2 p 
ser. xi. —VOL. III. 
