----, _Patagonian_, i. 7. ----, _White-banded_, i. 8. _Modest Spine-tail_, i. 183. _Molina's Parrot_, ii. 43. Molothrus badius, i. 84, 86, 87, 88, 91, 92, 93, 95, 104. ---- bonariensis, i. 18, 72, 74, 75, 78, 79, 81, 82, 83, 84, 85, 86, 88, 91, 92, 93, 154. ---- pecoris, i. 72, 74, 86. ---- rufoaxillaris, i. 86, 91, 92, 93, 95, 104. ---- sericeus, i. 72. _Molú Chueké_, ii. 219. Molybdophanes cærulescens, ii. 112. _Mourning Finch_, i. 54. _Mouse-brown Tyrant_, i. 119. Muscicapara viridicata, i. 146. Muscisaxicola macloviana, i. 133. ---- maculirostris, i. 134. ---- mentalis, i. 133, 134. ---- rufivertex, i. 134. _Muscovy Duck_, ii. 129. Mycteria americana, ii. 106. Myiarchus atriceps, i. 157; ii. 223. ---- erythrocercus, i. 156. ---- fasciatus, i. 126; ii. 227. ---- ferocior, i. 156; ii. 223. ---- ferox, i. 156, 157. ---- tyrannulus, i. 156, 157. Myiobius nævius, i. 151. Myiodynastes solitarius, i. 150. Myiotheretes rufiventris, i. 82, 112, 114, 117; ii. 76. _Ñacundá_, ii. 12. ---- _Goatsucker_, ii. 12. _Ñacurutú_, ii. 51. _Nandú_, ii. 216. _Narrow-billed Wood-hewer_, i. 201. _Narrow-tailed Tyrant_, i. 139. Nasica gracilirostris, i. 199. _Night-Heron, Dark_, ii. 105. Noctua cunicularia, ii. 52. _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.