----, _Misto_, i. 69. ----, _Yellow_, i. 69. _Seed-Snipe, Common_, ii. 176. ----, _D'Orbigny's_, ii. 178. _Seriema_, ii. 161. Serpophaga nigricans, i. 141. ---- subcristata, i. 140, 141, 142. Setophaga brunneiceps, i. 21. _Sharp-tailed Parrot_, ii. 42. _Short-billed Tyrant_, i. 155. _Short-eared Owl_, ii. 49. _Short-footed Tyrant_, i. 156. _Short-winged Goatsucker_, ii. 16. ---- _Tyrant_, i. 131. _Shoveller, Red_, ii. 136. _Shrike, Deep-billed Greenlet-_, i. 24. ----, _Ochre-headed Greenlet-_, i. 23. _Silver-bill Tyrant_, i. 129. _Siskin, Black-headed_, i. 64. ----, _Half-black_, i. 65. Sisopygis icterophrys, i. 76, 125. Sittosomus erithacus, i. 198. ---- olivaceus, i. 198. _Skimmer, Black-tailed_, ii. 193. _Slaty Finch_, i. 53. _Slaty-blue Bush-bird_, i. 204. _Slender-billed Plover_, ii. 174, 175. _Small-crested Tyrant_, i. 140. _Snipe, Common Seed-_, ii. 176. ----, _D'Orbigny's Seed-_, ii. 178. ----, _Painted_, ii. 182. ----, _Paraguay_, ii. 181. _Snowy Egret_, ii. 99. _Sociable Marsh-Hawk_, ii. 72. _Solitary Cassique_, i. 72. ---- _Pigeon_, ii. 144. ---- _Sandpiper_, ii. 188. ---- _Tyrant_, i. 150. _Song-Sparrow, Chingolo_, i. 58. ----, _Patagonian_, i. 59. ----, _Red-flanked_, i. 60. ----, _Stripe-headed_, i. 60. ----, _Yellow-shouldered_, i. 60. _Sordid Spine-tail_, i. 184. _Sorry Tyrant_, i. 144. _Southern Courlan_, ii. 159. Sparganura sappho, ii. 3. _Sparrow, Common Song-_, i. 58. ----, _Patagonian Song-_, i. 59. ----, _Red-flanked Song-_, i. 60. ----, _Stripe-headed Song-_, i. 60. ----, _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.