238 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. I50 



Sharpe's account in volume 1 of the Catalogue of Birds in the 

 British Museum (1874, p. 216), where the genus name Uruhitinga is 

 used for the species anthracina Lichtenstein and schistacea Sundevall. 

 The description given by Taczanowski is detailed and complete and 

 agrees fully in color and in small size with the race currently known 

 as subtilis. This is substantiated by his quotations from Stolzmann 

 and Jelski, collectors of his specimens, who describe the birds as 

 found in the mangroves in the delta of the Rio Tumbes, where they 

 fed on crabs, and were almost stupidly tame. 



URUBITORNIS SOLITARIA SOLITARIA (Tschudi): Solitary Eagle; 

 Aguila Solitaria 



Circaettts solitarins Tschudi, Arch. Naturg. vol. 10, Bd. 1, 1844, p. 264. (Rio 

 Chanchamayo, Peru.) 



Of eagle size, dark gray, with tail banded with white. 



Description. — Length 600 to 800 mm. Adult, dark slaty gray; 

 upper tail coverts tipped with white ; tail black, tipped narrowly with 

 white, and with a broad central band of white, mixed with neutral 

 gray on some of the feathers ; feathers of hindneck basally white ; 

 primaries and secondaries banded indistinctly with paler gray ; outer- 

 most primaries banded with grayish white, more prominently toward 

 base. 



Immature, back and wings fuscous, edged on back with cinnamon, 

 and with indistinct grayish and buff mottling on the middle and 

 greater coverts; crown fuscous; rest of head and under surface, in- 

 cluding under tail coverts, buff to whitish buff, streaked with fuscous ; 

 a fuscous-black patch on breast; tibia fuscous, barred lightly with 

 cinnamon ; under surface of wing cream buff, with heavy fuscous 

 markings on the under wing coverts. 



Measurements. — This species is so rare that it has been difficult to 

 assemble comparable measurements since most records in literature 

 do not indicate whether the wing size given is taken from the chord 

 or from the wing flattened. Some figures apparently include a mix- 

 ture of the two. The notes that follow I have made personally, with 

 the wing measured on the chord. 



Males (3 specimens), wing 490-506 (496), tail 219-227 (222), 

 culmen from cere 38.2-41.5 (39.8), tarsus 125.1-127.5 (126.1). 



Female (one specimen), wing 513, tail 255, culmen from cere 44.0, 

 tarsus 120.2 mm. 



Four additional birds with sex not marked have the wing 492-500, 

 tail 254-260, culmen from cere 39.5-40.0, and tarsus 122.6-129.8 mm. 



Resident. Rare, in areas of heavy forest. 



