12 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. I45 



has a wide distribution in northern South America, including Trini- 

 dad, but has not been found previously outside those limits. 

 Short-tailed Swift, Chaetura brachyura brachyura (Jardine) : 



On September 12, i960. Dr. Nathan Gale found one lying dead 

 at Corozal, Canal Zone, and brought it to the laboratory of the 

 Malaria Control Service. Here Eustorgio Mendez of the Gorgas 

 Memorial Laboratory secured it and prepared the skin, which is 

 now in the U. S. National Museum. The species has a wide range 

 in South America from the north coast to eastern Peru and central 

 Brazil, with populations in St. Vincent, Trinidad, and Tobago. The 

 Canal Zone record is the first report of it for Panama. 



VI. ADDITIONS TO THE LIST OF BIRDS KNOWN 

 FROM COLOMBIA 



Studies of the extensive collections of birds from northern Co- 

 lombia in the U. S. National Museum in connection with work on 

 the avifauna of Panama continues to add to the forms known from 

 that republic. Recent additions in this field are as follows : 

 Savanna Hawk, Heterospisias meridionalis rufulus (Vieillot) : 



Examination of a considerable series of these beautiful hawks 

 verifies recognition of two forms on the basis of size. The southern 

 group that breeds from southern Paraguay and Rio Grande do Sul, 

 Brazil, to the provinces of Cordoba and Santa Fe, in northern Argen- 

 tina, ranges in wing measurement, regardless of sex, from 418 to 

 452 mm. During the period of southern winter part of these larger 

 birds move northward into the territory of the typical race. The 

 northern population, true meridionalis, resident from Panama, Co- 

 lombia, and Venezuela to Bolivia, northern Paraguay, and south- 

 central Brazil, varies in wing measurement from 379 to 412 mm. 



A female that I shot near Maicao in the Guajira Peninsula, north- 

 eastern Colombia, on April 14, 1941, with primaries worn at the 

 tip, has the wing still 418 mm. long, and so represents a migrant or 

 wanderer of the southern subspecies. Other breeding specimens taken 

 during the same period in the Guajira in their smaller size are 

 typical meridionalis. 

 Gray Hawk, Buteo iiitidus blakei Hellmayr and Conover: 



A female collected by M. A. Carriker, Jr., at Acandi in northern 

 Choco, on the western side of the Gulf of Uraba, is typical of this 

 race of adjacent Panama. It differs from Buteo nitidus nitidiis, found 

 elsewhere in northern Colombia, in being darker gray above, par- 

 ticularly on the crown and hindneck. Apparently blakei does not 



