[226] On Ardetta, Translation of Cuvier’s ‘Règne Animal,’ by Mr. Blyth, footnote, p. 159. On the Peregrine Falcon, Mr. Blyth, in Charlesworth’s ‘Mag. of Nat. Hist.’ vol. i. 1837, p. 304. On Dicrurus, ‘Ibis,’ 1863, p. 44. On the Platalea, ‘Ibis,’ vol. vi. 1864, p. 366. On the Bombycilla, Audubon’s ‘Ornitholog. Biography,’ vol. i. p. 229. On the Palæornis, see, also, Jerdon, ‘Birds of India,’ vol. i. p. 263. On the wild turkey, Audubon, ibid. vol. i. p. 15: I hear from Judge Caton that in Illinois the female very rarely acquires a tuft. [227] Mr. Blyth has recorded (Translation of Cuvier’s ‘Règne Animal,’ p. 158) various instances with Lanius, Ruticilla, Linaria, and Anas. Audubon has also recorded a similar case (‘Ornith. Biog.’ vol. v. p. 519) with _Tyranga æstiva_. [228] See Gould’s ‘Birds of Great Britain.’ [229] In regard to thrushes, shrikes, and woodpeckers, see Mr. Blyth, in Charlesworth’s ‘Mag. of Nat. Hist.’ vol. i. 1837, p. 304; also footnote to his translation of Cuvier’s ‘Règne Animal,’ p. 159. I give the case of Loxia from Mr. Blyth’s information. On thrushes, see also Audubon, ‘Ornith. Biography,’ vol. ii. p. 195. On Chrysococcyx and Chalcophaps, Blyth, as quoted in Jerdon’s ‘Birds of India,’ vol. iii. p. 485. On Sarkidiornis, Blyth, in ‘Ibis,’ 1867, p. 175. [230] See, for instance, Mr. Gould’s account (‘Handbook of the Birds of Australia,’ vol. i. p. 133) of Cyanalcyon (one of the Kingfishers) in which, however, the young male, though resembling the adult female, is less brilliantly coloured. In some species of Dacelo the males have blue tails, and the females brown ones; and Mr. R. B. Sharpe informs me that the tail of the young male of _D. Gaudichaudi_ is at first brown. Mr. Gould has described (ibid. vol. ii. p. 14, 20, 37) the sexes and the young of certain Black Cockatoos and of the King Lory, with which the same rule prevails. Also Jerdon (‘Birds of India,’ vol. i. p. 260) on the _Palæornis rosa_, in which the young are more like the female than the male. See Audubon (‘Ornith. Biograph.’ vol. ii. p. 475) on the two sexes and the young of _Columba passerina_. [231] I owe this information to Mr. Gould who shewed me the specimens; see also his ‘Introduction to the Trochilidæ,’ 1861, p. 120. [232] Macgillivray, ‘Hist. Brit. Birds,’ vol. v. p. 207-214. [233] See his admirable paper in the ‘Journal of the Asiatic Soc. of Bengal,’ vol. xix. 1850, p. 223; see also Jerdon, ‘Birds of India,’ vol. i. introduction, p. xxix. In regard to Tanysiptera, Prof. Schlegel told Mr. Blyth that he could distinguish several distinct races, solely by comparing the adult males. [234] See also Mr. Swinhoe, in ‘Ibis,’ July, 1863, p. 131; and a previous paper, with an extract from a note by Mr. Blyth, in ‘Ibis,’ Jan. 1861, p. 52. [235] Wallace, ‘The Malay Archipelago,’ vol. ii. 1869, p. 394.