m 
Synopsis of the Birds 
Male, three outer tail feathers pure white at tip. 
Female, tip of the outer tail feathers ochreous. 
Whip-poor-wdl , Caprimulgus vociferus , Wils. Am . Orn. 
p. ni.pl. 41 . l. male, 2. female, 3. young recently hatched „ 
C. virginianus, VieilL necauct. 
Inhabits the United States during summer : far less com- 
mon than the following in the middle and northern states. 
69. Caprimulgus virginianus, Briss. Bill without bristles ; 
tail forked, not reaching to the tips of the wings; primaries 
plain blackish, with a white spot. 
Male, triangular spot on the throat, and band on the tail y 
white. 
Night-Hawk , Caprimulgus americanus , Wils Am. Orn. v . 
p. 65.pl. AO. fig. 1. male. 2 . female. C. popetue, Vieill. 
Inhabits the United States during summer, common in 
the middle states. 
DIURNAL. 
Eyes and ears moderate. Plumage close and compact. 
Middle toe nail not pectinated. 
14. CYPSELUS. 
Hirundo L. Briss. Cm. Lath. Cuv. Hirundo, Cypselus, 
111 . Vieill. Ranz . Apus , Scopoli. Cuv. ( subg .) JVlicropus ? 
Wolf. Meyer. Brachypus, Meyer. Cypsetus , Temm. 
Bill extremely short, triangular, cleft to the eyes ; upper 
mandible slightly notched near the tip, which is rather 
obtuse; lower somewhat shorter, and a little recurved at tip: 
nostrils lateral, approximate, large, partly covered by a 
feathered membrane, leaving a small tubular aperture : tongue 
short, wide, cartilaginous, bifid at tip. Feet remarkably 
short ; toes divided ; hind toe versatile, generally directed 
forward; middle toe a little longer than the lateral sube- 
quai ones ; hind toe shortest : nails very retractile, beneath 
canalicuLated ; the middle one largest; hind nail smallest. 
