FAMILY APODIDAE 243 



2 Chiriqui specimens in the British Museum I am not certain of their 

 color. I may say only that the male collected by Handley on Cerro 

 Hoya, Los Santos, is dark so that apparently it is nubicola. 



CYPSELOIDES CRYPTUS Zimmer: Zimmer's Swift, 

 Vencejo de Zimmer 



Cypscloides cryptus Zimmer, Auk, vol. 62, no. 4, October 19, 1945, p. 588. 

 (Inca Mine, Rio Tavara, Peru.) 



Of medium size ; plain sooty brown, some with a white chin spot. 



Description. — Length 135-146 mm. Adult, sooty black above; 

 lores deep black; feathers on side of forehead and above loral area 

 more or less edged with grayish white ; under surface dark grayish 

 brown; some individuals with a white chin spot (possibly found 

 only in adult males). 



Immature, feathers on anterior edge of wing, abdomen, and under 

 tail coverts tipped narrowly with grayish white. 



Measurements. — Males (5 from British Honduras, Colombia, and 

 Peru), wing 131.0-140.0 (134.6), tail 41.5-52.0 (45.5), culmen from 

 base 8.5-10.1 (8.9), tarsus 16.0-17.1 (16.3, average of 4) mm. 



Females (7 from British Honduras, Costa Rica, Panama, and 

 Venezuela), wing 129.0-138.5 (132.7), tail 42.0-48.5 (45.1), culmen 

 from base 7.2-9.2 (8.5), tarsus 15.4-17.1 (16.3) mm. 



Weight, 35.8, 40.2 grams (Beebe, Zoologica, Vol. 34, 1949, p. 60). 



Status uncertain. Two records known from Panama. 



A male taken at Armila, San Bias, July 4, 1932, by Hasso von 

 Wedel, was recorded originally by Rogers (Auk, 1939, p. 83) under 

 the name Cypseloides fumigatus. In October 1961, I examined an 

 immature female from the collections of the Los Angeles County 

 Museum, submitted for verification by K. E. Stager, that had been 

 collected by James R. Northern at Bahia Hermosa, Isla Coiba, on 

 March 23, 1957. Mr. Stager informed me that the bird was shot from 

 a mixed flock that also contained the smaller Chaetura vauxi ochro- 

 pygia. 



This little-known bird was confused with Cypseloides fumigatus 

 and C. niger until recognized by Zimmer in the reference cited under 

 the name at the head of the present account. It is known at present by 

 specimens from widely scattered localities in British Honduras, Nica- 

 ragua, Costa Rica, Panama, Colombia, Venezuela, Guyana, and Peru. 

 As there are no breeding records at present some of the birds recorded 

 are presumed to have been migrants or wanderers. 



