467 



RelationsMps. — This genus is of extreme interest, from the fact that it 

 approaches more nearly than any other of the group to the Falcones. 

 The general external resemblance to the falconiue genus Hieracidea is 

 very close indeed ; the different eraargination of the primaries being the 

 chief distinction. 



Species of MiLVAao. 



Common cJiaracters. — Tail transversely mottled, and more or less dis- 

 tinctly barred with dusky and white (the latter predominating), 

 becoming uniformly dusky terminally in a broad, well-defined zone ; 

 tail-coverts white; base of the primaries mottled with whitish. 



1. M. CHIMANGO.— Wing, 10.30-11.20; tail, C.30-8.50: culmen, 0.65-0.80; 

 tarsus, 2.10-2.45 ; middle toe, 1.25-1.50. Tail grayish-white, becoming 

 pure white basally; its surface finely mottled, the mottling assuming 

 the form of transverse bars toward the base and on the inner webs ; ter- 

 minal zone dusky grayish-brown, not well defined. Primary coverts 

 whitish, barred with dusky or grayish. Adult : General color grayish- 

 brown, with a faint fulvous or cinnamon cast, paler, less grayish, and 

 obscurely barred with grayish-white beneath. Young: Above dusky 

 brown, the feathers tipped with whitish ; beneath transversely mottled 

 with brown and ochraceous, the latter on the tips of the feathers. Had. — 

 Southern South America, from Tierra del Fuego north to latitude 20° 

 south on the Pacfic coast, and to Rio on the Atlantic. 



2. M. CHIMACHIMA.— Wing, 10.70-11.80; tail, 7.20-8.50; culmen, 

 0.75-0.92; tarsus, 1.85-2.20; middle toe, 1.35-2.50. Tailochraceous-white, 

 crossed by narrow dark bands of coarsely-mottled grayish and dusky — 

 sometimes of nearly uniform dusky — the subterminal zone brownish- 

 black, and well defined. Primary-coverts blackish, unbarred. Adult: 

 Head, neck, and entire lower parts immaculate pale ochraceous ; upper 

 parts uniform brownish-black, the feathers indistinctly lighter at the 

 tips ; primary-coverts broadly tipped with grayish-white. Young : Head, 

 neck, and lower parts brownish-black, longitudinally striped with ochra- 

 ceous-white; upper parts dusky, the secondaries obscurelj^ barred with 

 reddish-ochraceous or dull rusty. Hah. — South America generally, 

 south to Paraguay (latitude 20° south), north to Yeragua. 



MILYAGO CHIMANGO. 



Tolyborus cliimavgo Vieill. N. D. v, 1816, 2G0 ; Enc. Mdth. iii, 1324, 1182.— D'Orh. Voy. 

 Am. Mdricl. Ois. 1835, 60; Synop. Av. Mag. Zool. 1838, 3.— Darw. Jonrn. Kesid. 

 18.39, 64. — TSCHUDI, Consp. Av. Wiegni. Archiv, 1844, 262; Fauna Peruana, 1845, 

 79.— ScHLEG. Mus. P.-B. Polybori, 1862, 6. 



Haliaetus cliimango Less. Tr. 1831, 43. 



Caracara cliimango d'Orb. Voy. Am. M6iid. Ois. 1835, GO. 



Milvago cliimango. Darw. Voy. Beag. Birds, 1841, 14.— Gray, Gen. B. 1844, i, pi. 5 

 (adult) ; List, Ace. Br. Mus. 1848, 29 ; Hand List, i, 1869,5.— Kaup, Mus. Senck. 

 1845, 262.— Hartl. Syst. Ind. Azara, 1847, 1.— Peale, U. S. Exp]. Exp. 1848, 

 61.— Bonap. Consp. i, 1850, 13.— Strickl. Orn. Svnon. i, 1855, 20.— Pelz. Verh. 

 z.-b. Ges. Wien, 1862, 136 ; Orn. Novara, 1865, 6 (Chili) ; Orn. Bras. 1871, 392.— 

 GURXEY, Cat. Rapt. Norw. Mus. 1864, 26.— ScL. & Salv. P. Z. S. 1868, 143 (Con- 

 chitas, Eesp. Argent, resident); Ibis, iv, 1868, 187 (Str. Magellan; Dec.); 

 P. Z. S. 1869, 252 (Lake of Valencia, Venez.) ; Noni.Neotr. 1873, 122.— Hudson, 

 P. Z. S. 1872, 534 (Eio Negro, Patagonia).— Eidgw. Pr. Boston Soc. May, 



1873, 10. 



Ihijcter cliimango Kaup, Arch, f . Naturg. xvi, 1850, 41.— Siiarpe, Cat. Ace. B. M. 



1874, 41. 



Aquila pezojwra MEYEN,Beitr. 1834, 62, pi. 6.— Bonap. Consp. i, 1850 (sub Milranb). 



Milvago pezoporns Darw. Zool. Beag. Birds, 1841, 13.— Bridg. P. Z. S. pt. 11, 109; 

 Ann. Nat. Hist, xiii, 499.— Strickl. Orn. Syu. i, 1855, 20. 



