----, _Yellow House-_, i. 66. ----, _Yellow-shouldered Song-_, i. 60. Spatula platalea, ii. 136. Speotyto cunicularia, ii. 52. Spermophila analis, i. 57. ---- cærulescens, i. 46, 79. ---- inornata, i. 57. ---- melanocephala, i. 45. ---- palustris, i. 45. ---- rufirostris, i. 57. Spheniscus magellanicus, ii. 206, 207. _Spine-tail, Brown-crested_, i. 177. ----, _Brown-fronted_, i. 178. ----, _D'Orbigny's_, i. 183. ----, _Eyebrowed_, i. 178. ----, _Hudson's_, i. 186. ----, _Modest_, i. 183. ----, _Patagonian_, i. 186. ----, _Pretty-throated_, i. 181. ----, _Rush-loving_, i. 174. ----, _Sordid_, i. 184. ----, _Spix's_, i. 179. ----, _Striped_, i. 182. ----, _Tit-like_, i. 177. ----, _White's_, i. 181. ----, _White-throated_, i. 179. ----, _Wren-like_, i. 188. ----, _Yellow-marked_, i. 185. _Spine-tailed Swift, Ringed_, ii. 11. _Spiny Leaf-scraper_, i. 174. _Spix's Spine-tail_, i. 179. Spiziapteryx circumcinctus, ii. 73. _Spoonbill, Roseate_, ii. 114. Sporophila ornata, i. 46. ---- rufirostris, ii. 227. _Spot-billed Tyrant_, i. 134. _Spot-winged Crake_, ii. 155. ---- _Falcon_, ii. 73. ---- _Gull_, ii. 198. ---- _Pigeon_, ii. 140. _Spotted Dove_, ii. 141. ---- _Puff-bird_, ii. 30. ---- _Rail_, ii. 148. ---- _Tinamou_, ii. 211. _Starling, De Filippi's_, i. 105. ----, _Patagonian Marsh-_, i. 104. Steganopus wilsoni, ii. 180. Stelgidopteryx ruficollis, i. 36. Stenopsis bifasciata, ii. 14. Stephanophorus cæruleus, i. 38. ---- leucocephalus, i. 38. Sterna argentea, ii. 197. ---- cassini, ii. 196. ---- frobeenii, ii. 195. ---- hirundinacea, ii. 196. ---- magnirostris, ii. 194. ---- maxima, ii. 195. ---- minuta, ii. 197. ---- superciliaris, ii. 197. ---- trudeauii, ii. 195. Stigmatura budytoides, i. 139. ---- flavo-cinerea, i. 10, 139. _Stilt, Brazilian_, ii. 179. _Stork, Maguari_, ii. 106. _Strange-tailed Tyrant_, i. 123. _Stripe-headed Song-Sparrow_, i. 60. _Striped Spine-tail_, i. 182. ---- _Tyrant_, i. 111. Strix flammea, ii. 48. ---- perlata, ii. 48. Sturnella defilippii, i. 105. ---- militaris, i. 104. Sublegatus griseocularis, i. 147. _Suiriri chorreado_, i. 129. _Suiriri pardo y roxo_, i. 156. ---- _roxo_, i. 163. ---- _Tyrant_, i. 146. _Sulphury Tyrant_, i. 147. _Surucuá_, ii. 29. _Swainson's Buzzard_, ii. 59. _Swallow, Bank_, i. 33. ----, _Red-necked_, i. 36. ----, _White-rumped_, i. 30. _Swan, Coscoroba_, ii. 126. _Swift, Ringed Spine-tailed_, ii. 11. Sycalis chloropis, i. 69. ---- lutea, i. 69. ---- luteiventris, i. 69. ---- luteola, i. 69. ---- pelzelni, i. 66, 85. ---- uropygialis, i. 69. Sylbeocyclus dominicus, ii. 205. Sylvia chivi, i. 22. ---- viridicata, i. 146. Sylvicola venusta, i. 20. Synallaxis ægitholoides, i. 84, 177.