TITLES. 
Aves 3 
18. Bailey, F. M. Additional notes on the birds of the Upper Pecos. 
Auk xxi, pp. 349-363. [Charadriiformes, Galliformes, Trochilt, 
Tyrannidce, Fringillidce, Motacillidce^ Mimidce, Turdidce.l 
19. . Additions to Mitchell's list of the summer birds of San Miguel 
County, New Mexico. T. c. pp. 443-449. [Tyrannidce^ Fringillidce.'] 
20. . Twelve Rock Wren Nests in New Mexico. Condor vi, 
pp. 68-70. 
21. . A Dusky Grouse and her brood in New Mexico. T. c. 
pp. 87-89 cum fig. 
22. Bangs, 0. Two new subspecies of tropical American Tyrant-birds. 
P. Soc. Washington xvii, pp. 113 & 114. [Tyrannidce.'] 
23. Bannerman, D. A. Ornithological notes made during a trip to the 
West Indies. Zoologist 1904, pp. 228-230, 
24. Barboza du Bocage. Contribution a la Faune des quatre iles du 
Golfe de Guinee. J. Sci. Lisb. (2) vii. No. xxvi, Oiseaux, pp. 72-90. 
25. Barnard, C. A. Coomooboolaroo notes. Emu iv, pp. 67 & 68. 
26. Barrett-Hamilton, G. E. H. A physiological theory to explain the 
winter- whitening of birds and mammals in snowy countries, and the 
most striking points in the distribution of white in vertebrates gene- 
rally. Rep. Brit. Ass. 1903, pp. 698 & 699. 
27. . On the sound produced by the wings of birds in flight. Ibis 
1904, pp. 474 & 475. 
Bartels, M. [See Finsch, 0. (188).] 
28. Bartsch, p. Notes on the Herons of the District of Columbia. 
Smithson. Collect, xlv, pp. 104-111, pis. xxxii-xxxviii. 
Bates, G. L. [See Sharpe, R. B. (592).] 
29. Bau, a. Die Eier von Larus audouini. Ornith. Jahrb. xv, pp. 1-10, 
Taf. i. \_Lariformes.~\ 
30. . Nochmals Erithacus cairii. Ornith. Monber. xii, pp. 4-6. 
[TurdidcB.'] 
31. Beck, R. H. Bird life among the Galapagos Islands. Condor vi, 
pp. 1-11, \_Mimidce, Felecaniformes.] 
32. Beddard, F. E, a note upon the tongue and windpipe of the 
American Vultures, with remarks on the interrelations of the genera 
Sarcorhampkus, Gypagus and Cathartes. P. Zool. Soc. London 1903, 
ii, pp. 386-392, text-figg. 45-48, [^Cathartiformes.'] 
33. . Exhibition and remarks on the brain of a Troupial {Quiscalus 
versicolor). Op. cit. 1904, ii, p. 2. [^Icteridoe.'] 
33a. . On the skull of the Cape Crowned Crane [Balearica chryso- 
pelargiLs). T. c. p. 131. \_Ardeiformes.'] 
34. Beebe, C. W. Breeding of Lawrence's Warbler {Helminthophila 
lawrencei) in New York City. Auk xxi, pp. 387 & 388. \Mnio- 
tiltidce.] 
35. Benson, C. W, Some notes on Swiss birds observed in June, 1904. 
Zoologist 1904, pp. 423 & 424. 
36. Bent, A. C. Nesting habits of the Herodiones in Florida. Auk xxi, 
pp. 20-29, 259-270, pis. ix & x, xix-xxi. \_Ardeifor7nes.'\ 
