598 BULLETIN 50, UNITED STATES NATIONAL MUSEUM 



cc. Scapulars and median upper wing coverts barred with blackish and 

 whitish. 

 d. Size larger, wings 410 mm. or more. 



P. plancus plancus, ad. (extralimital) " 



17 Falco plancus J. F. Miller, Var. Subj. Nat. Hist., 1777, pi. 17 (Tierra del 

 Fuego); Gmelin, Syst. Nat., i, pt. 1, 1788, 257.— Vuliur plancus Latham, Index 

 Orn., i, 1790, 8; Shaw, Gen. Zool., vii, pt. 1, 1809, 41 (Christmas Sound, Tierra 

 del Fuego); Vieillot, Nouv. Diet. Hist. Nat., xiv, 1817, 239. — Falco plancus 

 Daudin, Traits d'Orn., ii, 1800, 42. — Polyhorus plancus Brabourne and Chubb, 

 Birds South Amer., i, 1912, 62, part (Bolivia to Straits of Magellan); Stone, Rep. 

 Princeton Univ. Exped. Patag., ii, pt. 4, 1915, 555 (synonymy; descr. ; habits); 

 Marelli, El Hornero, i, 1918, 77 (Curuzil Cutid, Corrientes, Argentina); Dabbene, 

 El Hornero, i, 1918, 94 (Martin Garcia Island, Argentina); Swann, Synopt. List 

 Accip., pt. 1, 1919, 7, part; Synop. Accip., pt. 1, 1921, 12, part; Wace, El Hornero, 

 ii, 1921, 202 (Falkland Islands, breeding); Daguerre, El Hornero, ii, 1922, 265 

 (Rosas, Argentina); Seri6 and Smyth, El Hornero, iii, 1923, 43 (Santa Elena, 

 Argentina). — Falco tharus Molina, Saggio Stor. Nat. Chile, 1782, 264 (Chile); 

 Gmelin, Syst. Nat., i, pt. 1, 1788, 254; Latham, Index Orn., i, 1790, 16; Daudin, 

 Traits d'Orn., ii, 1800, 41; Shaw, Gen. Zool., vii, pt. 1, 1809, 170; Sonnini and 

 Vieillot, Nouv. Diet. Hist. Nat., xiv, 1817, 240. — Circactos tharus Lichtenstein, 

 Nomencl. Mus. Berol., 1854, 3. — Polyhorus tharus Strickland, Orn. Syn., i, 1855, 

 19, part; Gray, Hand-list, i, 1869, 6, No. 35, part (Straits of Magellan); Ridgway, 

 Proc. Acad. Nat. Sci. Philadelphia, 1870, 145, part; in Baird, Brewer, and Ridg- 

 way, Hist. North Amer. Birds, iii, 1874, 177, footnote, part (synonymy; descr.); 

 U. S. Geol. and Geogr. Surv. Terr., ser. 2, BuU. 6, 1876, 455, part (monogr.) ; 

 Man, North Amer. Birds, 1887, 254, part; Sclater and Salvin, Nom. Av. Neotr., 

 1873, 123, part; Sharpe, Cat. Birds Brit. Mus., i, 1874, 31, part (Hermit Island, 

 Straits of Magellan); Coues, Birds Northwest, 1874, 370, footnote (synonymjOl 

 Durnford, Ibis, 1876, 161 (Buenos Aires; habits; descr. nest); Gibson, Ibis, 1879, 

 415 (Cape San Antonio, Buenos Aires; habits, descr. eggs); Gurney, List Diurn. 

 Birds Prey, 1884, 12, part; Cat. Birds Prey, 1894, 18, part; Schalow, Zool. Jahrb., 

 Suppl. iv, Heft 3, 1898, 692 (Puerto Rosario, etc., Chile; Punta Arenas, Patagonia; 

 crit.); Crawshay, Birds Tierra del Fuego, 1907, 1 (habits); Hartert and Venturi, 

 Nov. Zool., xvi, 1909, 237 (Barracas al Sud and Los Vasques, Tucvimdn, Argen- 

 tina; descr. eggs). — (?) Polyhorus tharus var. Sclater, Proc. Zool. Soc. London, 

 1876, 333, pi. 25. — Polyhorus brasiliensis Vigors, Zool. Journ., 1, 1824, 320; 

 Stephens, in Shaw's Gen. Zool., xiii, pt. 2, 1826, 11; Gould, Zool. Voy. Beagle, 

 pt. 3, 1841, 9; Kaup, Isis, 1847, 349, part (monogr.), 370, 373, 375, 381, part; in 

 Jardine's Contr, Orn., 1850, 78; Gray, List Spec. Brit. Mus., pt. 1, ed. 2, 1848, 31, 

 part (Straits of Magellan; Hermit Island); Bonaparte, Consp. Gen. Av., i, 1850, 

 13, part (excl. syn. cheriway Jacquin) ; Rev. Mag. Zool., vi, 1854, 539; Schlegel, 

 Mus. Pays-Bas, ii. No. 9, 1863, 2, part (monogr.); No. 36, 1873, 137. — Polyhorus 

 (Polyhorus) brasiliensis Kaup, Mus. Senckenb., iii, Heft iii, 1845, 262. — Vultur 

 cheriway (not Falco cheriway Jacquin, 1784) Latham, Index Orn., i, 1790, 8. — Falco 

 cheriway Lichtenstein, Verz. Doubl., 1823, 60, part (Montevideo, Uruguay). — 

 Aquila cheriway Meyen, Beitr., 1834, 66. — Polyhorus vulgaris d'Orbigny, Voy. 

 Amer. Merid., pt. 3, 1839, 55; Hellmayr, Nov. Zool., xxviii, 1921, 175 (crit.). 

 d'Orbigny and Lafresnaye, Synopsis Avium, 1839, 3, part (Argentina; Chile; 

 Bolivia). — Caracara vulgaris Lesson, Traite d'Orn., 1831, 34, pi. 9, fig. 2. — Pandion 

 caracara Gray (G. R.), in Griffith's ed. Cuvier's Anim. Kingdom, vi, 1824, 235. — 

 Polyhorus plancus plancus Swann, Monogr. Birds Prey, i, 1925, 67 (monogr.); 



