FAMILY APODIDAE 24I 



the neck, extended forward on the cheeks ; upper throat (in the birds 

 seen from Panama), breast and rest of lower surface brownish black. 



Female, commonly without the cinnamon- rufous collar ; otherwise 

 like the male ; the collar when present usually reduced in extent and 

 duller in color. 



Measurements. — Males (9 from Guatemala, Costa Rica, Panama, 

 and Colombia), wing 120.6-129.0 (125.1), tail 43.5-48.9 (45.4), oil- 

 men from base 6.8-7.9 (7.3), tarsus 11.3-12.7 (11.8) mm. 



Females (10 from Mexico, Guatemala, Costa Rica, and Colombia), 

 wing 120.0-127.5 (123.6), tail 41.2-44.1 (43.2), culmen from base 

 7.1-8.6 (7.7), tarsus 11.4-12.8 (12.1) mm. 



Weight, males 19.25-22.25 (20.6) grams; females 17.75-24.25 

 (19.6) grams. (Data from Charles T. Collins; records from C. r. 

 rutilus made in Trinidad.) 



Status uncertain. Known from Chiriqui and Los Santos (Cerro 

 Hoya). 



The first published report of this swift in Panama is by Hartert 

 (Cat. Birds Brit. Mus., vol. 16, 1892, p. 494) who lists 2 males in the 

 Salvin-Godman collection from "Chiriqui (Arce)." Salvin and God- 

 man (Biol. Centr.-Amer., Aves, vol. 2, 1894, p. 378) record it from 

 "Chiriqui, Calovevora (Arce)." The Calovevora locality, which is 

 in Veraguas, appears to be in error as the only specimens in the Salvin- 

 Godman collection in the British Museum (Natural History) are the 

 2 labeled "Chiriqui, 1870, Arce." listed by Hartert. The reference 

 cited is the only basis for including Veraguas in the known range in 

 Panama. 



There are 2 other specimen records. A male was captured Febru- 

 ary 24, 1962, by Charles O. Handley, Jr., at 1,200 meters elevation, on 

 Cerro Hoya, Los Santos, in a mist net set across a stream "just 

 after dark." A female was taken in the same manner at dawn on 

 February 26, and preserved in formalin. The male is peculiar in hav- 

 ing the front of the tarsus heavily feathered throughout its length. 

 The feathering in most specimens is confined to the proximal end, 

 while in an occasional bird it extends for approximately half the 

 length on the front and sides. 



Eugene Eisenmann informs me that on February 21, 1960, at El 

 Salto above Boquete, 20 or more of a large number of swifts that 

 circled below him as he stood at the summit of a cliff showed the 

 conspicuous rufous collar of this species. 



In one locality in Oaxaca, Mexico, Rowley and Orr (Proc. West. 

 Found. Vert. Zool., vol. 1, no. 3, 1966, pp. 131-132, figs. 13-14) 



