_Noisy Tyrant_, i. 145. Nomonyx dominicus, ii. 138. Nothoprocta cinerascens, ii. 210. ---- doeringi, ii. 210, 223. ---- pentlandi, ii. 210, 211. Nothura cinerascens, ii. 210. ---- darwini, ii. 213. ---- maculosa, ii. 211, 213, 214. ---- major, ii. 211. ---- minor, ii. 213. ---- perdicaria, ii. 213. Numenius borealis, ii. 192. Nycticorax gardeni, ii. 105. ---- obscurus, ii. 98, 99, 105. Ochetorhynchus dumetorius, i. 170. ---- luscinia, i. 171. ---- ruficauda, i. 171. _Ochre-headed Greenlet-Shrike_, i. 23. Ochthœca leucophrys, i. 121. Œnops aura, ii. 89. _Oily-green Anabazenops_, i. 198. _Olive Ground-Finch_, i. 63. _One-banded Buzzard_, ii. 63. _Orange-chested Hobby_, ii. 69. Oreophilus ruficollis, ii. 174. ---- totanirostris, ii. 174. Oreotrochilus leucopleurus, ii. 1. Ornismya angelæ, ii. 5. ---- aureoventris, ii. 9. Orospina pratensis, i. 71; ii. 223. Ortalida canicollis, ii. 147. ---- guttata, ii. 147. Ortalis canicollis, ii. 147. Ortygometra melanops, ii. 156. Oryzoborus maximiliani, i. 44. _Ostrich_, ii. 216. Otus brachyotus, ii. 49. ---- palustris, ii. 49. _Oven-bird, Crested_, i. 170. ----, _Red_, i. 167. _Owl, Burrowing_, ii. 52. ----, _Choliba_, ii. 51. ----, _Common Barn-_, ii. 48. ----, _Pygmy_, ii. 56. ----, _Short-eared_, ii. 49. ----, _Virginian_, ii. 50. _Oyster-catcher, American_, ii. 176. Pachyrhamphus albescens, i. 146. ---- albinucha, ii. 222. ---- minimus, i. 138. ---- polychropterus, i. 162. _Painted Snipe_, ii. 182. _Pajaro ardilla_, ii. 37. ---- _Negro_, i. 72. ---- _Niño_, ii. 207. Palamedea chavaria, ii. 119. _Pampas Woodpecker_, ii. 24. _Paraguay Snipe_, ii. 181. Paroaria capitata, i. 48. ---- cucullata, i. 47. Parra jacana, ii. 163. _Parrakeet, Aymara_, ii. 46. ----, _Green_, ii. 43. ----, _Red-billed_, ii. 46. _Parrot, Bank_, ii. 41. ----, _Burrowing_, ii. 41. ----, _Molina's_, ii. 43. ----, _Patagonian_, ii. 41. ----, _Prince Maximilian's_, ii. 47. ----, _Red-headed_, ii. 43. ----, _Sharp-tailed_, ii. 42. Parula pitiayumi, i. 20. Patagiœnas maculosa, ii. 139. Patagona gigas, ii. 1, 4, 5. _Patagonian Earth-Creeper_, i. 170. ---- _Marsh-Starling_, i. 104. ---- _Mocking-bird_, i. 7. ---- _Parrot_, ii. 41. ---- _Sand-Plover_, ii. 172. ---- _Song-Sparrow_, i. 59. ---- _Spine-tail_, i. 186. _Pato ceja blanca_, ii. 132. ---- _collar negro_, ii. 132. ---- _creollo_, ii. 129. ---- _overo_, ii. 136. ---- _picaso_, ii. 136. ---- _Portugues_, ii. 133. ---- _real_, ii. 129. ---- _silvon_, ii. 127. _Pavo del Monte_, ii. 146. _Pearly-bellied Tyrant_, i. 136. _Pecho-amarillo_, i. 102. ---- _colorado_, i. 106. _Pectoral Sandpiper_, ii. 183, 184. Penelope boliviana, ii. 146. ---- canicollis, ii. 147. ---- obscura, ii. 146.