---- similis, i. 41. ---- superciliaris, i. 41. ----, _Yellow-billed_, i. 42. Saltatricula multicolor, i. 61. _Sanderling_, ii. 186. _Sandpiper, Baird's_, ii. 184, 185. ----, _Bartram's_, ii. 189. ----, _Bonaparte's_, ii. 185. ----, _Buff-breasted_, ii. 190. ----, _Pectoral_, ii. 183, 184. ----, _Solitary_, ii. 188. _Sand-Plover, Azara's_, ii. 173. ----, _Patagonian_, ii. 172. _Sangre de Toro_, i. 152. ---- _Pura_, i. 152. _Sappho Humming-bird_, ii. 3. ---- sparganura, ii. 3. Sarcidiornis carunculata, ii. 128. ---- regia, ii. 128. Sarcorhamphus gryphus, ii. 90. _Saria, La_, ii. 161. Saurophagus sulphuratus, i. 147. Sayornis cineracea, i. 121. _Scarlet Tyrant_, i. 152. _Scarlet-headed Marsh-bird_, i. 101. _Schulz's Dipper_, i. 11. ---- _Woodpecker_, ii. 18. _Scissor-bill_, ii. 193. _Scissor-tail Tyrant_, i. 160. _Sclater's Curassow_, ii. 145. Sclerurus caudacutus, i. 174. ---- umbretta, i. 174. Scolopax frenata, ii. 181. ---- ---- magellanica, ii. 181. Scops brasilianus, ii. 51. _Screamer, Crested_, ii. 119. _Screaming Cow-bird_, i. 86. ---- _Finch_, i. 46. Scytalopus indigoticus, i. 205. ---- superciliaris, i. 205; ii. 223. ----, _White-eyebrowed_, i. 205. _Seed-Finch, Meadow_, i. 71. ----, _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.