BOOKS ON ORNITHOLOGY 



BIGELOW, HENRY B. On hybrids between the 

 Mallard (Anas boschas) and certain other ducks. By 

 Henry B. Bigelow, 1907. ("The Auk," vol. 24, 1907, 

 PP. 383-388.) 2 4 cm ' ' 

 Autograph copy. 



BIGLAND, JOHN. A natural history of birds, 

 fishes, reptiles, and insects by John Bigland. Illus. by 

 12 col. pi. engraved mostly from original drawings. 

 Philadelphia. Pub. by John Grigs, 1828. x, 179 pp. 

 12 col. pi. ; front, col. ; also 1st t.-p. Two copies. 1828- 

 1832. Later bound under title of "History of Birds, 

 etc." 



Date on col. t.-p. 1828, and on next p. 1832. Very 



little difference in two editions. 



BIRTWELL, FRANCIS J. Observations on color- 

 changes in the genus Buteo, apparently due to aptoso- 

 chromatism. By Francis J. Birtwell, 1903. 14 pp. 



BIRTWELL, FRANCIS J. The occurrence of 

 Aptosochromatism in Passerina cyanea. By F. J. 

 Birtwell, 1900. (From "Science," vol. n, n. s., no. 

 769, pp. 291-299.) 22 cm< 



BLAAUW, F. E. A monograph of the Cranes. By 

 F. E. Blaauw. Illus. by 22 col. pi. ... by Heinrich 

 Leutemann and J. G. Keulemans. Leiden and London, 

 E. J. Brill, R. H. Porter, 1897. viii, 64 pp. 18 col. pi. 



4 gcm. 



BLACKBURN, MRS. HUGH. Birds drawn from 

 nature. By Mrs. Hugh Blackburn. Edmonston & 

 Douglas, Edinburgh, 1862. 23 pi. with preface and 

 index. 38 cm> 



BLACKWELDER, ELIOT. Research in China. 

 In three volumes and atlas. . . . Part two. Petro- 

 graphy and Zoology, by Eliot Blackwelder. Syllabary 



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