232 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. I50 



were built of sticks, placed in a crotch, sometimes amid large limbs 

 where only the rim was visible from below. Nests containing young 

 were noted at the Cienaga Macana, near Paris, Herrera, March 17, 



1948, and near the Rio Pacora, above Pacora, Panama, April 21, 



1949. No description of the egg of this form is known to me. 



The screaming call, something like that of the red-tailed hawk, but 

 clearer, less harsh, and therefore more pleasing in its usual utterance, 

 has four notes, of which the first two are given quickly, and the last 

 two in slower, drawn out syllables. In imitation, the bird has the 

 country name of cocoUno. 



The race ridgwayi ranges north through Central America to north- 

 ern Mexico. 



BUTEOGALLUS URUBITINGA URUBITINGA (GmeUn) 



Falco Urubitinga Gmelin, Syst. Nat., vol. 1, pt. 1, 1788, p. 265. (Pernambuco, 

 fide Pinto, Cat. Aves Brasil, pt. 1, 1938, p. 76.) 



Characters. — Tail in adult white, with a single broad subterminal 

 black bar. Size as in 5. u, ridgwayi. 



Resident at the eastern end of the Comarca de San Bias (recorded 

 from specimens taken at Perme and Puerto Obaldia by Hasso von 

 Wedel). 



This is the form of extensive range in South America that enters 

 the Republic from Colombia along the northeastern coast. 



Schonwetter (Handb. Ool., pt. 3, 1961, p. 145) states that the 

 eggs in general are Hke those of species of the genus Buteo, with 

 some plain in color and others marked sparingly to heavily with 

 reddish brown, varied to lilac. Measurements are 57.4-61.2x47.0- 

 49.4 mm. 



BUTEOGALLUS ANTHRACINUS (Deppe): Lesser Black Hawk; 

 Gavilan Cangrejero 



Slaty black, with base of bill and loral area orange yellow. 



Description. — Length 430 to 510 mm. Adult, black, with more or 

 less of a slaty wash; upper tail coverts tipped with white; tail banded 

 rather broadly across center and tipped with white ; feathers of crown 

 white at base ; upper back and hindneck white mixed with buff at 

 base in varying amount, in some absent; under wing with bases of 

 primaries mottled with white. 



Immature, fuscous ; cheeks, and indefinite streaks on head, hind- 



