FAMILY APOD1DAE 2J3 



similis is not adopted by the authors, but treated simply as an unneces- 

 sary synonym of C. vauxi. Since, however, it is associated with a 

 reference to Lawrence and critical comments, Lawrence's ms. name 

 acquires at this point nomenclatural validity." 



Under an amendment to the International Code of Zoological 

 Nomenclature, adopted in 1963, and published the following year, Ar- 

 ticle lid on publication in synonymy now reads "A name first pub- 

 lished as a synonym is not thereby made available unless prior to 

 1961 it has been treated as an available name with its original date 

 and authorship, and either adopted as the name of a taxon or used as 

 a senior homonym." 



As Deignan's citation is dated 1961 similis is not available for the 

 somewhat larger and definitely darker populations of Chactura vauxi 

 of Central America, currently recognized as richmondi Ridgway 1910. 

 The race ranges from Oaxaca and Veracruz in southern Mexico to 

 western Panama. 



CHAETURA VAUXI OCHROPYGIA Aldrich 



Chaetura vauxi ochropygia Aldrich, Scient. Publ. Cleveland Mus. Nat. Hist., 

 vol. 7, August 31, 1937, p. 68. (Paracote, Veraguas, Panama.) 



Characters. — Rump and upper tail coverts paler, lighter grayish 

 brown, definitely lighter in color than the breast ; average measure- 

 ments slightly smaller. 



A female taken on Isla Canal de Afuera, off the southern coast of 

 Veraguas, March 21, 1962, had the iris dark brown ; bill black ; tarsus 

 dull reddish brown ; toes darker ; claws light brown at base, dull 

 neutral gray at tips. 



Measurements. — Males (10 from Veraguas, Isla Coiba, and Isla 

 San Jose), wing 107.0-111.0 (109.2), tail 33.4-36.5 (34.8), culmen 

 from base 6.3-7.7 (7.1), tarsus 10.0-12.2 (11.3) mm. 



Females (10 from Veraguas and Isla San Jose), wing 108.8-114.4 

 (110.6), tail 32.8-36.4 (34.6), culmen from base 6.9-7.7 (7.3), tarsus 

 10.2-12.0 (11.3) mm. 



Resident. Found in the lowlands on the Pacific slope in central 

 Panama; islas Coiba, Canal de Afuera, San Jose, and Pedro Gon- 

 zalez. 



This race is known at present by specimens from southern Veraguas 

 (Sona, Paracote, Cerro Viejo), Isla Coiba, Isla Canal de Afuera, and 

 from Isla San Jose and Isla Pedro Gonzalez in the Archipielago de 

 las Perlas. It has been my impression that swifts evidently of this 



