CYPSELIDA—SWIFTS. sy 
Order. MACROCHIRES. 
Family CYPSELIDZ. 
Genius CYPSELUS. 
SWIFT. ~~ 
Cypselus apus (Zzzz.) 
Adult: Chin and throat white ; rest of plumage very sooty- 
brown ,; bill and feet black ; irides dark brown. Length 8 to 8:5 
inches ; culmen 0°4 ; wing 6°8 to 8; tail 3°15; tarsus 0°6. 
Young: Similar but have purer white throats and feathers 
of forehead and under parts are more or less margined with 
whitish. 
Distribution : Summer visitant to most of Palearctic region, 
wintering in Africa. 
Habitat: Flying wherever insects abound about buildings 
or cliffs. 
PALLID SWIFT. 
Cypselus pallidus Shed/ey. 
Adult : Adove uniform brownish-grey, inclining to white on 
forehead ; feathers before eyes blackish ; wings and tail-feathers 
greyish-brown ; chin and throat white ; sides of head and neck 
pale greyish-brown ; feathers of breast and abdomen darker 
greyish-brown, some having whitish tips; bill black ; feet dark 
purplish-brown. Length 6 inches; culmen o°3; wing 6°6; tail 
3; tarsus oS. 
Distribution : Summer visitant to Spain, North-eastern 
Africa, Madeira and the Canaries. 
Habitat: Probably similar to that of C. apus. 
