BIRDS OF NORTH AND MIDDLE AMERICA: 691 
equal in length, the outer slightly but decidedly shorter; hallux 
very short; all the toes, together with their claws, very strong, and, 
together with tarsus, rather densely feathered. 
Coloration.—Glossy blue-black, relieved by a small white spot on 
each side of forehead, a white area covering chin, throat, upper 
chest, and sides of neck (extending across hindneck as a narrow 
band), and a white patch on each side of rump; secondaries and 
distal primaries grayish toward tip and margined terminally with 
white. Sexes alike. 
Nidification.—Nest a long tubular structure, open at lower end 
and attached at the more or less enlarged upper end to the under 
surface of an overhanging rock or base of a branch of large tree, 
composed of downy plant seeds, plant down, bits of bark or lichens, 
etc., glued together by the bird’s salivary excretion. Eggs placed 
in a lateral pocket within the enlarged upper portion of the tube. 
KEY TO THE SPECIES OF PANYPTILA. 
a. Smaller (wing 116-120). (Nicaragua to Brazil and Ecquador.) 
Panyptila cayanensis (p. 691). 
a. Larger (wing 180-195). (Guatemala.).......Panyptila sancti-hieronymi (p. 692). 
PANYPTILA CAYANENSIS (Gmelin). 
CAYENNE SWIFT 
Adults (sexes alike).—General color uniform velvety black with a 
faint bluish gloss; inner webs of primaries and terminal portion of 
secondaries mostly, or in part, dark grayish brown, the former 
narrowly edged, the latter terminally margined with white; a patch 
on each side of rump, a supraloral spot or broad streak, chin, throat, 
upper chest, and sides of neck white, the latter confluent with a 
band or collar of grayish white or pale brownish gray across hind- 
neck; outer web of outermost pair of rectrices dull white or pale 
grayish basally; bill black; iris dark brown; feet (where not feath- 
ered) grayish brown or dusky, claws pale grayish brown or grayish 
white. 
Adult male.—Length (skins), 118-121 (119.5); wing, 118-120 (119); 
tail, 55.5-60 (57.7); exposed culmen, 5-6.5 (5.7); tarsus, 8.5; mid- 
dle toe, 6-7 (6.5).¢ 
Adult female.—Length (skins), 119-123 (121); wing, 116.5-117.5 
(117); tail, 54-58 (56); exposed culmen, 5.5-6 (5.7); tarsus, 8; 
middle toe, 5.5-6 (5.7).¢ 
Southeastern Nicaragua (Rio Escondido) and southward through 
eastern Costa Rica,’ eastern Panamaé (Rio Chagres) through Colom- 
bia (Bogoté; Antioquia), Venezuela, the Guianas, and Amazon 
@ Two specimens. 
> The species has not yet been recorded from Costa Rica, however, so far as I am 
aware. 
