243 XORTII AMERICAN BIRDS. 



Aleutian Islands, west to Commander Islands, and south along 

 Pacific coast to Oregon. 



356<i. F. peregrinus pealei Eintav. Peale's Falcon, 

 c'. Second quill longest, but first longer than third ; second with inner 

 web not appi'ceiably sinuated near tip ; adult and young not verj^ 

 different in plumage, the latter not distinctlj- striped beneath; size 

 small (wing not exceeding 12.00 — usually much less). (Subgenus 

 Ncofalco EiDGW.') 

 </'. Wing 9.50, or more ; under tail-coverts oehraceous, or white and 

 rufous, with largo transverse spots of black ; upper tail-coverts 

 barred with white or pale ashj-. Adult: Above plumbeous 

 black, distinctly bordered with bluish plumbeous; throat and 

 chest immaculate white centrally and antcrioi-ly, rufous later- 

 ally and posteriorly; thighs plain rufous. Young: Above uni- 

 form dull black, the feathers eometimes slightly margined with 

 rusty ; throat and chest varying from white to oehraceous or 

 rufous, this alwaj's 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-C.25, culmen .90, tarsus 1.50-1.60, 

 middle toe 1.85-2.10. Hab. Tropical America in general (ex- 

 cept AVest Indies), north to southern Mexico. 



F. deiroleucus Tf.mm. Temminck's Falcon.' 

 Jl Wing not more than 9.00 ; under tail-coverts deej) rufous^ usually 

 immaculate, but sometimes slightl}' 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 oehraceous posteriorly. Young : 

 Similar to adult, but upper parts without plumbeous bars or 

 tips, and sometimes having a slight brownish cast, the feathers 

 usual!}' with indistinct rusty margins ; throat and chest deep 

 oehraceous, the latter usually with a few duskj- streaks. Male : 

 Lengtii 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, fail 5.00-5.50, culmen .58, tarsus 

 1.48-1.55, middle too 1.30-1.40. Hab. Tropical America in 

 general (except West Indies), north to northern Jfexico (Xuevo 

 Leon and Mazatlan). ' 



F. albig^laris Daud. White-throated Falcon.' 



' New subgenus; typo, Falcn alhigiilnrin Daud. 

 t Fnlco d'iruhuciitiTKWV., PI. Col. i. 1825, )il. .318. 

 > Falco albiijulari, DAUn., Trail«, ii. ISOO, 131. 



