240 BIRDS OF THE REPUBLIC OF PANAMA — PART 2 



on upper back to grayish brown on rump ; throat and upper f oreneck 

 sooty brown ; under tail coverts grayish brown, somewhat darker than 

 the rump ; rest of under surface dull black. 



Measurements. — Males (7 from Trinidad, Colombia, and Panama), 

 wing 115.6-119.9 (118.1), tail 28.3-29.4 (28.6), culmen from base 

 5.4-6.5 (5.9) tarsus 11.0-11.8 (11.3) mm. 



Females (5 from Trinidad and Guyana), wing 119.0-120.6 (119.8), 

 tail 27.5-29.8 (28.8), culmen from base 5.1-6.1 (5.7), tarsus 11.0-11.6 

 (11.3) mm. 



Weight, 15.5-22.0 (18.3) grams (data from Charles T. Collins). 



Rare. Possibly of accidental occurrence. 



The only record is of a male, found dead at Corozal, Canal Zone, 

 September 12, 1960, by Dr. Nathan Gale. The specimen is in the U. S. 

 National Museum. 



The race is known mainly from Trinidad, Venezuela, and the 

 Guianas, with few records from Colombia. 



Snow (Zoologica, 1962, pp. 131-134, 139) in Trinidad, found this 

 species placing its nest on the walls of sea caves, and also in chim- 

 neys, in a nest-box on the trunk of a tree, and in the manholes of a 

 drainage system in an abandoned military camp. The normal set was 

 of 3 to 5 eggs, with 1 set that held 6. The nest was a shallow cup made 

 of small twigs, cemented together by a mucous secretion from the 

 mouth of the bird, attached to the wall of the sheltering cavity. The 

 young, like chimney swifts, climb out of the nest while still unfeath- 

 ered, and cling to the wall nearby. A set of 5 eggs in the British 

 Museum collected on Nelson Island, Port of Spain, Trinidad, are long 

 oval to oval, dull white without gloss. Measurements are 18.1-19.1 X 

 12.8-13.1 mm. 



Outside the nesting season the birds roost in holes often with several 

 individuals clumped together. 



CYPSELOIDES RUTILUS (Vieillot) : Chestnut-collared Swift, 

 Vencejo Cuellicastano 



Hirundo rutila Vieillot, Nouv. Diet. Hist. Nat., Nouv. ed. vol. 14, September 

 1817, p. 528. (Guiana.) 



Medium size ; rump sooty black, like the back ; male with rufous- 

 brown collar ; female usually plain, but some marked like the male. 



Description. — Length 122-135 mm. Tail with very short projecting 

 spines. Male, lores deep black; crown, back to upper tail coverts, 

 wings and tail sooty black; a broad collar of cinnamon-rufous around 



