----, _Dark-backed_, i. 37. ----, _D'Orbigny's_, i. 41. ----, _Four-coloured_, i. 40. ----, _Purple-and-Yellow_, i. 37. ----, _Red-capped_, i. 40. ----, _White-capped_, i. 38. ----, _Yellow-striped_, i. 41. Tanagra bonariensis, i. 39. ---- cyanoptera, i. 39. ---- sayaca, i. 39. ---- striata, i. 39. Tantalus loculator, ii. 108. _Tapacola, White-necked_, i. 207. _Tataupa Tinamou_, ii. 208. _Teal, Blue-winged_, ii. 130. ----, _Brazilian_, ii. 133. ----, _Grey_, ii. 131. ----, _Ring-necked_, ii. 132. ----, _Yellow-billed_, ii. 131. _Tern, Cassin's_, ii. 196. ----, _Eyebrowed_, ii. 197. ----, _Great_, ii. 195. ----, _Great-billed_, ii. 194. ----, _Trudeau's_, ii. 195. _Tero-tero_, ii. 195. _Téru-real_, ii. 179. _Téru-réru_, ii. 80. ---- _del campo_, ii. 79. _Téru-téru_, ii. 166. Thamnophilus argentinus, i. 204. ---- cærulescens, i. 204. ---- leachi, i. 202. ---- major, i. 203. ---- ruficapillus, i. 204. ---- stagurus, i. 203. Thaumatias albicollis, ii. 7. Theristicus caudatus, ii. 110. ---- melanops, ii. 110. _Thickbill, Black-and-Yellow_, i. 43. _Thick-billed Grebe_, ii. 206. Thinocorus orbignyanus, ii. 178. Thinocorus rumicivorus, ii. 176. _Thin-tailed Tyrant_, i. 138. Thlypopsis ruficeps, i. 40. _Thorn-bird, Red_, i. 194. ----, _Red-fronted_, i. 192. ----, _Red-winged_, i. 194. ----, _Whistling_, i. 192. _Thrush, Black-headed_, i. 4. ----, _Dusky_, i. 1. ----, _Magellanic_, i. 3. ----, _Red-bellied_ i. 3. _Tiger-Bittern, Marbled_, ii. 104. Tigrisoma brasiliense, ii. 104, 105. ---- fasciatum, ii. 104, 105. ---- marmoratum, ii. 104. _Tijereta_, i. 160. _Tinamou, Brown_, ii. 207. ----, _Cinereous_, ii. 210. ----, _Darwin's_, ii. 213. ----, _Great_, ii. 209. ----, _Martineta_, ii. 214. ----, _Pentland's_, ii. 210. ----, _Spotted_, ii. 211. ----, _Tataupa_, ii. 208. Tinnunculus cinnamominus, ii. 69, 70, 77. ---- sparverius, ii. 69. _Tiru-riru_, i. 189. ---- _del campo_, i. 187. _Tit-like Spine-tail_, i. 177. ---- _Tyrant_, i. 141. _Tit-Tyrant, Yellow-billed_, i. 142. _Toco Toucan_, ii. 40. Todirostrum margaritaceiventor, i. 136. _Torcasa_, ii. 141. _Tordo_, i. 72. ---- _Comun_, i. 72. ---- _negro cabeza roxa_, i. 101. ---- _pardo roxiso_, i. 96. _Tortola_, ii. 141. _Tortolita_, ii. 143. Totanus bartramia, ii. 189. ---- chilensis, ii. 186. ---- flavipes, ii. 187. ---- melanoleucus, ii. 25, 186, 187. ---- solitarius, ii. 188. _Toucan, Toco_, ii. 40. _Trarú_, ii. 82. _Tree-Duck, Fulvous_, ii. 126. ----, _White-faced_, ii. 128. _Tree-Martin_, i. 26. _Trepador comun_, i. 202. Triceus margaritiventro, i. 136. Trichothraupis quadricolor, i. 40. Tringa acuminata pectoralis, ii. 183. ---- arenaria, ii. 186. ---- bairdi, ii. 184. ---- bonapartii, ii. 185.