NORTH AMERICAN BIRDS. 
Aleutian Islands, west to Commander Islands, and south along 
Pacific coast to Oregon. 
356a. F. peregrinus pealei Rincw. Peale’s Falcon. 
ce’. Second quill longest, but first longer than third; second with inner 
web not appreciably sinuated near tip; adult and young not very 
different in plumage, the latter not distinctly striped beneath; size 
small (wing not exceeding 12.00—usually much less). (Subgenus 
Neofalco Ripew.") 
d', Wing 9.50, or more; under tail-coverts ochraceous, or white and 
rufous, with large transverse spots of black; upper tail-coverts 
barred with white or pale ashy. Adult: Above plumbcous 
black, distinctly bordered with bluish plumbeous; throat and 
chest immaculate white centrally and anteriorly, rufous later- 
ally and posteriorly ; thighs plain rufous. Young: Above uni- 
form dull black, the feathers sometimes slightly margined with 
rusty ; throat and chest varying from white to ochraceous or 
rufous, this always deepest laterally and posteriorly; thighs 
sometimes thickly spotted transversely with blackish. Male: 
Length about 12.50, wing 9.50-9.90, tail 5.40-5.50, culmen .72, 
tarsus 1.40-1.55, middle toe 1.75. Female: Length about 15.00, 
wing 10.90-12.00, tail 6.00-6.25, culmen .90, tarsus 1.50-1.60, 
middle toe 1.85-2.10. Hab. Tropical America in general (ex- 
cept West Indies), north to southern Mexico. 
F. deiroleucus TEMM, Temminck’s Falcon.” 
ad’, Wing not more than 9.00; under tail-coverts deep rufous, usually 
immaculate, but sometimes slightly barred with white and 
dusky ; upper tail-coverts indistinctly barred with plumbeous. 
Adult: Above plumbeous-black, the feathers with bluish 
plumbeous tips and edges, and, on rump, etc., more or less 
distinctly barred with same; throat and chest buffy whitish, 
becoming deeper buffy or ochraceous posteriorly. Young: 
Similar to adult, but upper parts without plumbeous bars or 
tips, and sometimes having a slight brownish cast, the feathers 
usually with indistinct rusty margins; throat and chest deep 
ochraceous, the latter usually with a few dusky streaks. Male: 
Length about 9.50-10.00, wing 7.20-8.80, tail 5.00-5.50, culmen 
58, tarsus 1.25-1.50, middle toe 1.15-1.30. Female: Length 
about 11.00, wing 8.50-9.00, tail 5.00-5.50, culmen .58, tarsus 
1.48-1.55, middle toe 1.30-1.40. Hab. Tropical America in 
general (except West Indies), north to northern Mexico (Nuevo 
Leon and Mazatlan). t 
F. albigularis Daup. White-throated Falcon.’ 
1 New subgenus; type, Falco albigularis Daun. 
2 Falco deiroleucus Temm., Pl. Col. i. 1825, pl. 348. 
5 Falco albigularis Daup., Traité, ii. 1800, 131. 
