FAMILY APODIDAE 239 



Larger, like the chimney swift, but with rump and upper tail coverts 

 grayish brown, definitely paler than the back. 



Description. — Length 115-122 mm. Adult (sexes alike), crown, 

 hindneck, back and inner secondaries fuscous-brown to fuscous-black ; 

 rump and upper tail coverts grayish brown; in some tipped very 

 narrowly with grayish white; wings dull black, with a faint bluish 

 sheen ; lores deep black ; stiff feathers over loral area edged narrowly 

 with grayish white ; throat light brownish gray ; breast, abdomen, and 

 sides sooty brown to very dark grayish brown; under tail coverts 

 grayish brown slightly darker than the rump. 



Iris dark brown, bill black ; tarsus and toes black. 



Measurements. — Males (7 from Argentina, Paraguay, and Brazil), 

 wing 125.7-129.7 (127.5), tail 33.8-38.7 (36.6), oilmen from base 

 5.0-6.5 (5.7), tarsus 10.5-13.3 (11.7) mm. 



Females (11 from Argentina, Paraguay, Brazil, Venezuela, and 

 Colombia), wing 126.1-139.6 (131.7), tail 34.7-39.8 (37.4), culmen 

 from base 5.1-7.1 (6.2), tarsus 10.0-12.8 (11.6) mm. 



Status uncertain. Probably a winter season migrant from South 

 America. 



The only record is a female in the Princeton Museum of Zoology, 

 collected near Juan Diaz, Panama, August 4, 1923. The bird was shot 

 from a flock (Rogers, Auk, 1939, p. 82). As this is the race that is 

 reported to nest from eastern and southern Brazil to the Paraguayan 

 Chaco and northern Argentina, this northern record is believed to be 

 that of a migrant from the south. As further indication of migration 

 a female of this race in the U. S. National Museum was collected at 

 Cartagena, Bolivar, in northern Colombia, on August 27, 1942, by 

 M. A. Carriker, Jr. 



The species was named for E. Andre of Trinidad. 



CHAETURA BRACHYURA BRACHYURA (Jardine) : 

 Short-tailed Swift, Vencejo Rabon 



Acanthylis brachyura Jardine, Ann. Mag. Nat. Hist., vol. 18, August 1846, 

 p. 120. (Tobago.) 



Small ; dull black, with brownish black throat and brownish gray 

 rump, upper and under tail coverts and tail. 



Description. — Length 100 to 115 mm. Tail short, less than 30 mm. 

 Adult (sexes alike), crown, side of head, hindneck, upper back and 

 wings black, with a faint sheen of greenish blue; rump, upper tail 

 coverts and tail grayish brown; shafts of rectrices black; lower back- 

 shading from sooty brown to brownish gray, in transition from black 



