Coryphospingus cristatus, i. 48. ---- pusillus, i. 48. Coscoroba Candida, ii. 126. ---- _Swan_, ii. 126. Cotile ruficollis, i. 36. _Cotorra_, ii. 44. Coturniculus manimbe, i. 60. ---- peruanus, i. 60. Cotyle fucata, i. 35. ---- leucorrhoa, i. 31. ---- pyrrhonota, i. 30. ---- tapera, i. 26. _Coucou_, ii. 38. _Courlan, Southern_, ii. 159. _Cow-bird, Argentine_, i. 72. ----, _Bay-winged_, i. 95. ----, _Screaming_, i. 86. _Crake, Marked_, ii. 155. ----, _Red-and-white_, ii. 154. ----, _Spot-winged_, ii. 155. _Crane-Hawk, Grey_, ii. 67. Crax alector, ii. 145, 146. ---- sclateri, ii. 145. _Creeper, Patagonian Earth-_, i. 170. ----, _Red-tailed Earth-_, i. 171. ----, _Warbling Earth-_, i. 171. _Creole Duck_, ii. 129. _Crested Cariama_, ii. 161. ---- _Duck_, ii. 128. ---- _Oven-bird_, i. 170. ---- _Screamer_, ii. 119. _Crispin_, i. 4; ii. 35. Crotophaga ani, ii. 31, 34. _Crowned Harpy_, ii. 66. Crypturus cinereus, ii. 207, 208. Crypturus obsoletus, ii. 207, 208. ---- tataupa, ii. 208. _Cuckoo, Black-billed_, ii. 38. ----, _Brown_, ii. 35. ----, _Chestnut_, ii. 36. ----, _Cinereous_, ii. 38. ----, _Dwarf_, ii. 39. ----, _Guira_, ii. 32. ----, _Yellow-billed_, ii. 37. _Cuervo_, ii. 90. Culicivora boliviana, i. 12. ---- dumicola, i. 12. ---- stenura, i. 139. _Curahí-remimbí_, ii. 100. _Curassow, Sclater's_, ii. 145. _Curved-bill Rush-bird_, i. 191. Cyanocorax azureus, i. 110. ---- cæruleus, i. 110. ---- chrysops, i. 110. ---- pileatus, i. 110. ---- tucumanus, i. 110; ii. 223. Cyanotis azaræ, i. 142, 144, 175. Cybernetes yetapa, i. 124. Cyclorhis altirostris, i. 24. ---- ochrocephala, i. 23. ---- viridis, i. 23, 24. Cygnus coscoroba, ii. 120. ---- nigricollis, ii. 124, 126. _Dabchick, American_, ii. 205. Dafila bahamensis, ii. 135. ---- spinicauda, ii. 134. _Dark-backed Tanager_, i. 37. _Dark-crested Finch_, i. 48. _Dark Guan_, ii. 146. ---- _Night-Heron_, ii. 105. _Dark-tailed Henicornis_, i. 173. _Darwin's Rhea_, ii. 219. ---- _Tinamou_, ii. 213. _Deep-billed Greenlet-Shrike_, i. 24. _De Filippi's Marsh-Starling_, i. 105. _Degollado_, i. 106. Dendrobates cactorum, ii. 19. Dendrocolaptes picumnus, i. 199. Dendrocygna fulva, ii. 126, 128. ---- major, ii. 127. ---- viduata, ii. 128. Dicholophus burmeisteri, ii. 162. ---- cristatus, ii. 161. Diplopterus galeritus, ii. 35. ---- nævius, ii. 35. _Dipper, Schulz's_, i. 11. _Diuca Finch_, i. 55. ---- ----, _Lesser_, i. 56. ---- grisea, i. 55. ---- minor, i. 56. ---- vera, i. 55. _Domestic Martin_, i. 25. _Dominican Gull_, ii. 197. ---- _Tyrant_, i. 117. Donacobius atricapillus, i. 13. ---- brasiliensis, i. 13. Donacospiza albifrons, i. 49. _D'Orbigny's Seed-Snipe_, ii. 178. ---- _Spine-tail_, i. 183.