Fam. I. TURDIDÆ, or THRUSHES. Page 1. _Turdus leucomelas_, Vieill. (Dusky Thrush.) 1 2. _Turdus rufiventris_, Vieill. (Red-bellied Thrush.) 3 3. _Turdus magellanicus_, King. (Magellanic Thrush.) 3 4. _Turdus fuscater_, d'Orb. et Lafr. (Argentine Blackbird.) 4 5. _Turdus nigriceps_, Cab. (Black-headed Thrush.) 4 6. _Mimus modulator_, Gould. (Calandria Mocking-bird.) 5 7. _Mimus patachonicus_ (d'Orb. et Lafr.). (Patagonian Mocking-bird.) 7 8. _Mimus triurus_ (Vieill.). (White-banded Mocking-bird.) [Plate I.] 8 Fam. II. CINCLIDÆ, or DIPPERS. 9. _Cinclus schulzi_, Cab. (Schulz's Dipper.) [Plate II.] 11 Fam. III. MUSCICAPIDÆ, or FLYCATCHERS. 10. _Polioptila dumicola_ (Vieill.). (Brush-loving Fly-snapper.) 12 Fam. IV. TROGLODYTIDÆ, or WRENS. 11. _Donacobius atricapillus_ (Linn.). (Black-headed Reed-Wren.) 13 12. _Troglodytes furvus_ (Gm.). (Brown House-Wren.) 13 13. _Troglodytes auricularis_, Cab. (Eared Wren.) 15 14. _Cistothorus platensis_ (Lath.). (Platan Marsh-Wren.) 15 Fam. V. MOTACILLIDÆ, or WAGTAILS. 15. _Anthus correndera_, Vieill. (Cachila Pipit.) 17 16. _Anthus furcatus_, d'Orb. et Lafr. (Forked-tail Pipit.) 19 Fam. VI. MNIOTILTIDÆ, or WOOD-SINGERS. 17. _Parula pitiayumi_ (Vieill.). (Pitiayumi Wood-singer.) 20 18. _Geothlypis velata_ (Vieill.). (Veiled Wood-singer.) 20 19. _Basileuterus auricapillus_, Sw. (Golden-crowned Wood-singer.) 21 20. _Setophaga brunneiceps_, d'Orb. et Lafr. (Brown-capped Wood-singer.) 21 Fam. VII. VIREONIDÆ, or GREENLETS. 21. _Vireosylvia chivi_ (Vieill.). (Chivi Greenlet.) 22 22. _Hylophilus pœcilotis_, Max. (Brown-headed Wood-bird.) 23 23. _Cyclorhis ochrocephala_ (Tsch.). (Ochre-headed Greenlet-Shrike.) [Plate III. fig. 1.] 23 24. _Cyclorhis altirostris_, Salvin. (Deep-billed Greenlet-Shrike.) [Plate III. fig. 2.] 24 Fam. VIII. HIRUNDINIDÆ, or SWALLOWS. 25. _Progne furcata_, Baird. (Purple Martin.) 24 26. _Progne chalybea_ (Gm.). (Domestic Martin.) 25 27. _Progne tapera_ (Linn.). (Tree-Martin.) 26 28. _Petrochelidon pyrrhonota_ (Vieill.). (Red-backed Rock-Martin.) 30 29. _Tachycineta leucorrhoa_ (Vieill.). (White-rumped Swallow.) 30