BIRDS OF NORTH AND MIDDLE AMERICA 367 



BUTEO NITIDUS BLAEEI Hellmayr and Conover 



Panama Gray Hawk 



Adult male. — Similar to that of Buteo nitidus plagiatus, but with 

 the entire upperparts obscurely to fairly definitely barred; the top of 

 the head, nape, and anterior interscapulars barred with whitish, the 

 rest of the upperparts barred with deep gull gray to dark gull gray, 

 these bars sometimes not very distinct from the deep neutral gray to 

 dark neutral gray of the darker bars (or interspaces); rectrices with 

 only one complete white band and traces of a second one; chin and 

 uppermost part of throat whiter than in plagiatus; size averaging 

 slightly smaller. 



Adult female. — Similar to the male but larger. 



Immature. — Not known (if any). If this race does have a true 

 immature plumage it is probably similar to that of typical nitidus. 



Juvenal (sexes alike). — Generally similar to that of Buteo nitidus 

 plagiatus, but with the top of the head very different — cartridge buflF 

 more or less washed with ciimamon and the feathers of the central 

 and hind part of the crown with fairly broad fuscous-black median 

 streaks; upper wing coverts, scapulars, and interscapulars edged with 

 tawny; rectrices with fewer but broader bands (four or five blackish 

 bands as compared with seven fuscous-black ones in plagiatus) (one 

 specimen has four or five bands on the median pairs of rectrices and 

 seven narrow ones on the outermost pairs!) ; underparts much suffused 

 with tawny buff; chin and throat unspotted; breast, abdomen, sides, 

 and flanks spotted with broad tear-shaped fuscous-black spots, the 

 spots more rounded, less streaklike then in plagiatus. 



Natal down. — Not laiown. 



Adult male.— Whig 236-242 (239.4); tail 159-162 (162.8); culmen 

 from cere 21.5-23 (22.1); tarsus 67-73 (69.4); middle toe without claw 

 35-39 (36.8 mm.) (5 specimens from Panama). 



Adult female.— Wing 241-245 (242.8); tail 169-176 (172.8); culmen 

 from cere 22.5-23 (22.8); tarsus 71-74 (72.8); middle toe without 

 claw 37-40 (39 mm.) (4 specimens from Panama). 



Range. — Kesident in the tropical zone from southwestern Costa Rica 

 (Pozo del Rio Grande; El Pozo de Terraba), south on the Pacific 

 slope to the Panama Canal Zone and to extreme eastern Panama and 

 to the Santa Marta district of Colombia (Rio Frio, Bonda, Don Diego, 

 Mamatoco, Dibulla). 



Type locality. — Pozo del Rio Grande, Bornea (=Boruca), Costa 

 Rica. 



Asturina nitida (not Falco niiidus Latham. 1790) Lawrence, Ann. Lye. Nat. 

 Hist. New York, vii, 1861, 316 (Panama). — Sclater and Salvin, Proc. 

 Zool. Soc. London, 1864, 369 (Panama); Nom. Av. Neotr., 1873, 118, part 

 (Panama). — Salvin, Ibis 1870, 113, in text (Panama; crit.). — Sharpe, Cat. 



