Darwin has given us some interesting notes on this bird:--"This species is called by the Chilenos 'Tapacola,' or 'cover your posteriors.' The name is well applied, as the Tapacola generally carries its short tail more than erect, that is, inclined backward and toward the head. It is extremely common in Central Chile. The Tapacola frequents hedge-rows and the bushes which are scattered at a considerable elevation over the sterile hills, where scarcely another bird can exist; hence it plays a conspicuous part in the ornithology of Chile. The Tapacola is very crafty; when frightened by any person, it will remain motionless at the bottom of a bush, and will then, after a little while, try with much address to crawl away on the opposite side. It is also an active bird, and continually making a noise; these noises are various and strangely odd; one is like the cooing of doves, another like the bubbling of water, and many defy all similes. The country-people say it changes its cry five times in the year, which is according, I suppose, to some change of season. I was told that the Tapacola builds its nest at the bottom of a deep burrow." (Darwin, in Zool. Voy. 'Beagle,' iii. p. 72.) INDEX. _Acahé_, i. 110. Acanthylis collaris, ii. 11. Actiturus bartramius, ii. 189. Actodromas bairdi, ii. 184. ---- fuscicollis, ii. 185. ---- maculata, ii. 183. Æchmophorus major, ii. 202. Ægialitis cantiana, ii. 174. ---- collaris, ii. 173. ---- falklandica, ii. 172. _Afeytado_, ii. 114. _Agachona_, ii. 181. Agelæus flavus, i. 98. ---- ruficapillus, i. 99. ---- thilius, i. 97. Agriornis leucurus, i. 112. ---- maritima, i. 112. ---- striata, i. 111. _Aiaiai_, ii. 106. Ajaja rosea, ii. 114, 115, 116. _Alas-amarillas_, ii. 163. Alectrurus psalurus, i. 123. ---- risorius, i. 123. ---- tricolor, i. 122. _Allied Saltator_, i. 41. ---- _Woodpecker_, ii. 20. _Alma do gato_, ii. 37. _Alonzito_, i. 167. _Alonzo Garsia_, i. 167. Aluco flammeus, ii. 48. _Amazon, Blue-fronted_, ii. 47. ----, _Vinaceous_, ii. 46. _Amazonian Kingfisher_, ii. 27. Amblycercus solitarius, i. 72. Amblypterus anomalus, ii. 16. Amblyrhamphus holosericeus, i. 101. ---- ruber, i. 101. _American Dabchick_, ii. 205. ---- _Golden Plover_, ii. 170. ---- _Oyster-catcher_, ii. 176. ---- _Waterhen_, ii. 156. Anabates gutturalis, i. 197. ---- unirufus, i. 195. _Anabazenops, Oily-green_, i. 198. ---- oleagineus, i. 198. ---- rufo-superciliatus, i. 198. Anæretes flavirostris, i. 142. ---- parulus, i. 141. Anas bahamensis, ii. 135. ---- brasiliensis, ii. 133. ---- chiloënsis, ii. 135. ---- cyanoptera, ii. 130. ---- flavirostris, ii. 131. ---- maculirostris, ii. 131. ---- melanocephala, ii. 130. ---- oxyura, ii. 134. ---- peposaca, ii. 137. ---- platalea, ii. 136. ---- spinicauda, ii. 134. _Andean Flamingo_, ii. 119.