236 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. I50 



BUTEOGALLUS ANTHRACINUS BANGSI (Swann) 



Urubitinga anthracina bangsi Swann, Syn. Accipitres, pt. 2, Jan. 3, 1922, p. 98. 

 (San Miguel = Isla del Rey, Archipielago de las Perlas, Panama.) 



Characters. — Similar in color to B. a. anthracinus but definitely 

 smaller. 



Measurements. — Males (17 specimens), wing 325-348 {'i2>7), tail 

 176-213 (189), culmen from cere 23.6-28.8 (26.2), tarsus 80.0-90.0 

 (86.6) mm. 



Females (9 specimens), wing 337-363 (348), tail 186-212 (197), 

 culmen from cere 25.6-29.1 (27.2), tarsus 85.7-92.4 (88.1) mm. 



An adult female taken at Chiman on February 16, 1950, had the 

 iris hazel ; cere orange ; base of mandible, loral area, and eyelids orange 

 yellow ; base of maxilla, and center of mandible, duller yellow ; rest 

 of bill neutral gray ; tarsus and toes orange yellow ; claws black. 



Resident. Common in the swamps of the Pacific coast, particularly 

 in the mangroves, from western Chiriqui (Estero Rico below Alanje, 

 Las Lajas) ; Veraguas (Puerto Vidal, Rio San Pablo below Sona, 

 Paracote) ; Los Santos (Tonosi, Punta Mala, Pedasi, Puerto Men- 

 sabe. La Honda) ; Herrera (Paris, lower Rio Santa Maria) ; Code 

 (Puerto Aguadulce) ; Panama (La Jagua, Chico, Chepo, Chiman, 

 Maje) ; and Darien (El Real, Aruza, mouth of Rio Jaque) ; Isla 

 Parida; Isla Bolanos; Isla Brincanco, in the Contreras group; Isla 

 Canal de Afuera; Isla Cebaco; Archipielago de las Perlas (San Jose, 

 Rey, Cafias, Bayoneta, Malaga, and Contadora islands). 



Below Chepo and in the drainage of the Rio Chico these hawks 

 range for some distance in swampy areas inland from the coastal man- 

 groves. The same is true in the lowlands of Chiriqui where these 

 smaller birds are found back to Bugaba. Possibly occasionally, they 

 wander inland, as Goldman collected an immature bird of very small 

 size on the upper Rio Pacora in the lower levels of the Cerro Azul. 



In the mangroves bordering the Estero Salado, below Aguadulce, 

 Code, I saw one at its nest on January 25, 1963, an early date. The 

 site was a crotch in a large dead tree 15 meters from the ground. 

 Seen from below, the structure was a considerable accumulation of 

 twigs and small branches half again taller than the bird that rested 

 beside it. On Isla Parida these birds were in pairs during the first 

 week of February. 



These hawks were especially common in the swamps bordering 

 the Rio Pocri, at Puerto Aguadulce. Here one swooped at a floating 

 dowitcher that I had shot, but a heavy load at 70 meters, though it 

 did no harm, caused the hawk to veer away. A little later, however, 



