Perhaps to this genus belong _Muscicapa thamnophiloides_ and _cinerea_, figured by Spix, in his Aves, pl. 26. f. 1 and 2. _G. R. Gray._ Footnote 11: Molina, in his account of Chile, attributes this nest, I believe, through an error, to _Mimus thenca_. Footnote 12: Journal of Researches during the Voyage of the Beagle, p. 60. Footnote 13: This genus, and the following sub-genera, were named by Mr. Gould at a meeting of the Zool. Soc. Jan. 10 1837, p. 4. of Proceedings. Footnote 14: Remarks on the Plumage of Birds, Charlsworth’s Mag. of Nat. History, vol. i. p. 480. Footnote 15: Fauna Borealis, Birds, p. 278. Dr. Richardson states that the egg is only seven lines and a half in length. I presume the measure of eight lines, instead of twelve to the inch, must in this case have been used. I am much indebted to the kindness of Mr. Yarrell for lending me an egg of the _Molothrus pecoris_, forming part of a collection of North American eggs in his possession. Footnote 16: Wilson’s American Ornithology, vol. ii. p. 162. Footnote 17: Magazine of Zoology and Botany, vol. i. p. 217. Footnote 18: See Azara, vol. iii. p. 170. Footnote 19: It appears that the eggs in the same nest with that of the _Molothrus pecoris_, are turned out by the parent birds before they are hatched, owing to the egg of the _M. pecoris_ being hatched in an unusually short time; in the case of the young cuckoo, as is well known, the young bird itself throws out its foster-brothers. Mr. C. Fox, however, (Silliman’s American Journal, vol. xxix. p. 292), relates an instance of three young sparrows having been found alive with a Molothrus. Footnote 20: Humboldt, Pers. Narr. vol. v. part 1. p. 352. Cook’s Third Voyage, vol. ii. and Beechey’s Voyage. Footnote 21: Cowley’s Voyage, p. 10, in Dampier’s Collection of Voyages. Footnote 22: Dampier’s Voyage, vol. i. p. 103. For some further observations on the tameness of the birds on this and some other islands, see my Journal of Researches, p. 475. Footnote 23: In Hearne’s Travels in North America, (p. 383), it is stated that the Northern Indians shoot the varying hare, which will not bear to be approached in a straight line, in an analogous manner, by walking round it in a spire. The middle of the day is the best time, when the shadow of the hunter is not very long. Footnote 24: Sturt’s Travels, vol. ii. p. 74. Footnote 25: A Gaucho assured me that he had once seen a snow-white, or Albino variety, and that it was a most beautiful bird. Footnote 26: