450 BULLETIN 5 0, UNITED STATES NATIONAL MUSEUM 



the forehead, anterior crown, and broad superciliaries practically un- 

 streaked, creamy white, the hiad crown and nape as in the immature, 

 but with the dark spots edged with tawny; the chin and upper throat 

 pure unmarked creamy white; the breast much less washed with buffy 

 brown, this color practically confined to the edges of the dark shaft 

 streaks of a few lateral feathers; the anterior abdomen creamy white 

 washed with buffy brown and streaked (along the shafts) with fuscous 

 to fuscous-black, these shaft streaks widening and contracting to form 

 the semblance of incomplete bars. 



Natal down. — Unknown. 



Adult male.—Wmg 368.3-381 (374.6) ; tail 291.1-325 (309.4) ; culmen 

 from cere 27.5-29 (28.1); tarsus 81-88 (84); middle toe without claw 

 44-47 (45.6 mm.).^^ 



Adult female.— Wing 406.4-458.2 (430.9); tail 342.9-398.7 (379.4); 

 culmen from cere 29-31.5 (29.7) ; tarsus 90-95 (92) ; middle toe without 

 claw 46-53 (49.5 mm.).^^ 



Range. — Resident in heavy forest of the Tropical Zone from south- 

 ern Mexico (Veracruz — Medellin, Mhador, Portrero, Jalapa, Orizaba, 

 and Chiapas — Chicharras) south through Guatemala (Choctum, 

 Savana Grande, Duenas), Honduras (Potrerillos, San Pedro, Sabnana, 

 Middlesex), Nicaragua (Mombacho), El Salvador (Volcdn de San 

 Miguel), Costa Rica (Rancho Redondo, Juan Villas, Boruca, San Jose, 

 Tucurrique), Panama fCalobre, Veraguas, Lion Hill, Fruitdale, Obal- 

 dia: Changuinola; Rio Indio; Gatiin), Colombia (Bogota, Bondo, 

 Puerto Valdivia, Cucuta), Venezuela (Merida), Trmidad, the Guianas, 

 and BrazU (Par£, Bahia, Rio Belmonte, Rio Grande do Sul, Rio de 

 Janeiro, Rio Tapajoz, Borba; Sao Paulo; etc.) to Paraguay (Sapucay) 

 and Peru (Rio Huallaga). Not recorded from Ecuador; not found in 

 any of the West Indies or Tobago, although known from Trinidad. 



Type locality. — Quartel dos Arcos, Rio Belmonte, Bahia, Brazil. 



(?) Falco sonnini Shaw, Gen. ZooL, vii, pt. 1, 1809, 67 (Guiana; based on Petit 

 Aigle de la Guiane Sonnini, etc.).'" 



(?) Falco delicatus Shaw, Gen. Zool., vii (i), 1809, 68 (based on Petit Aigle de la 

 Guiane Sonnini, etc.). 



(?) Morphnus ? sonnini Stephens, Shaw's Gen. Zool., .xiii, pt. 2, 1826, 18. 



Falco tyrannus Wied, Reis. Bras., i, 1820, 360 (Rio Belmonte, Brazil; type now 

 in coll. Amer. Mus. Nat. Hist.); Beitr. Naturg. Bras., i, 1830, 84 (kio Bel- 

 monte). — Temminck, Planches Col., i, 1823, pi. 73 and text ( = juv.). 



Aquila tyrannus Lesson, Man. d'Orn., i, 1828, 84. 



Morphmis tyrannus Stephens, in Shaw's Gen. Zool., xiii, pt. 2, 1826, 20 (Brazil).— 

 CuviER, Rdgne Anim., i, 1829, 331.— Lesson, Traits d'Orn., 1831, 53. 



28 Five specimens from Mexico, Panama, and Surinam. 



2» Six specimens from Mexico, Honduras, Costa Rica, and Brazil. 



30 Sharpe (Cat. Birds Brit. Mus., i, 1874, 222) gives this reference under 

 Morphnus guianensis; but since Shaw's Falco sonnini is only 24 inches long and 

 has the legs "feathered to the toes," obviously it cannot be that bird. 



