4 Aves. 
XV. Aves. 
[1921 J 
64. — Beebe, W. A monograph of 
the Pheasants. Vol. ii pp. xvi -f 269 
24 col. pis. 24 photos 5 maps. Vol. iii 
pp. xvi -f 204 24 col. pis. 21 photos 
4 maps. London (Witherby) 1922 
4to. 
65. — Beebe, W. and Hartley S. A 
Christmas bird-census of Kartabo (Bt. 
Guiana). Zool. Soc. Bull. New York 
24 1921 pp. 139-144 photos. 
66. — Bennett, A. G. El Gorrion 
(Passer domesticus) en les islas Falk- 
land. Hornero Buenos Aires 2 1921 p. 
225. 
67. — Bensley, B. A. An egg of 
Struthiolithus chersonensis Brandt. 
Univ. Toronto Studies Biol ser. No. 19 
1921 pp. 1-7 pi. 
68. — Bent, A. G. Life histories of 
North American Gulls and Terns. Order 
Longipennes. Bui. U.S. Nat. Mus. 
Washington No. 113 pp. x + 340 77 
half-tone pis. 16 col. pis. 
69. — Bent, A. C. The probable 
status of the Pacific coast Skuas. 
Condor Berkeley Cal. 23 1921 pp. 
78-80. 
70. — Bergtold, W. H. The English 
Sparrow ( Pesser domesticus) and the 
motor vehicle. Auk Lancaster Pa. 
38 1921 pp. 244-250. 
71. — Bergtold, W. H. Mutants. Auk 
Lancaster Pa. 38 1921 p. 468. 
72. — Berlioz, J. Note sur des 
Oiseaux de passage dans le bassin de 
la Seine. Bui. Museum Paris for 
1921 p. 41. 
73. — Berlioz, J. Note sur une col- 
lection d’ Oiseaux provenant de la 
Chine meridionale. Bui. Museum Paris 
1921 pp. 268-271. 
74. — Berlioz, J. Etude d’une col- 
lection d’oiseaux provenant de l’Afrique 
Equatoriale. Rev. Fr. d’Orn. Paris 
13 1921 pp 6-9 37-41. 
75. — Bickerton, W. Notes on birds 
observed in Hertfordshire during 1919. 
Trans. Hertf. Nat. Hist. Soc. 17 1921 
pp. 274-282. 
76. — Bierens de Haan, J. A. Een 
merkwaardig vinkenjournaal. Ardea 
Leiden 10 1921 pp. 123-128. 
77. — Birch, G. Egret farming in 
Sind. J. Bombay N. H. Soc. 27 1921 
pp. 944-947. 
78. — Bishop, J. Bird notes from the 
Western Front. Ool. Rec. London 1 
1921 pp. 8-15. 
79. — Bishop, L. B. Description of 
a new Loon. Auk Lancaster Pa. 38 
1921 pp. 364-370. 
80. — Bishop, L. B. Notes from Con- 
necticut. Auk Lancaster Pa. 38 1921 
pp. 582-589. 
81. — Blaauw, F. E. Ornithologische 
waarnemingen tusschen Buenos-Ayres 
en Santiago. Ardea Leiden 10 1921 
pp. 1-9. 
82. — Blaauw, F. E. Ober bastaard- 
eenden (Nettion crecca $ x Dafila 
acuta $ ). Ardea Leiden 10 1921 p. 
190. 
83. — Blathwayt, F. L. Phonological 
report on first appearances of birds, 
etc., in Dorset during 1919. Proc. 
Dorset Nat. Hist. F. Cl. Dorchester 41 
1921 pp. 95-107. 
84. — Blomqvist, S. G. and Rosenberg 
E. Om fagellivet vid Narikes slat- 
tsjoar. Fauna och Flora Uppsala 1921 
pp. 1-21 49-72 photos. 
85. — Boase, H. The scarcity of 
Swallows [in Scotland]. J. Ministr. 
Agr. London 28 1921 pp. 526-530. 
86. — Boker, II. Praparate zur 
Ableitung der Fluganpassung der 
Vogel. Verhandl. Anat. Ges. Erg an - 
zungsheft zum Anat. Anz. 54 1921 
pp. 214-219 3 text-figs. 
87. — Bolam, G. Zoological Miscel- 
lanea. Vasculum Hexham 7 1921 pp. 
26-27. 
88. — Bolam, G. Little Bunting 
Emberiza pusilla Pallas ; a new bird 
for Northumberland. Vasculum Hex- 
ham 7 1921 pp. 31-32. 
89. — Bolam, G. Eagles in Northum- 
berland and on the borders during 
winter of 1920-21. Vasculum Hexham 
7 1921 pp. 104-106. 
90. — Bond, E. The later flights of 
the Passenger Pigeon. Auk Lancaster 
Pa. 38 1921 pp. 523-527 1 pi. 
