75. FALCO. 401 



neck white, tinged on the latter part witli tawny ; cheek-stripe 

 and a line of feathers from under the eye, running along the 

 upper margin of the ear-coverts, along the sides of the neck, grey- 

 ish black ; throat and chest, along with the hinder part of cheeks 

 and ear-coverts and sides of neck, buffy white ; sides of breast 

 black, varied with narrow white lines, meeting across the centre of 

 the body ; remainder of iinderparts clear tawny buff ; quills brown, 

 externally washed with greyish, internally barred with white ; 

 secondaries conspicuously tipped with whitish ; tail blackish brown, 

 tipped with white and crossed with about six white bands ; under 

 wing-coverts black with white bars, all the external ones bordering 

 the caqjal bend pale tawny ; cere and feet yellow ; bill horn-brown, 

 yellow at base. Total length 13-5 inches, culmen 0-85, wing 10, 

 tail 7, tarsus 1-9. 



Adult female. Similar to adult male, but larger and more richly 

 coloured ; the stripe on the side of the head and the underparts 

 rich tawny ; the black on the breast not meeting across the centre 

 (apparently an older specimen than the male). Total length 15-5 

 inches, culmen 1-2, wing 10-5, tail S-3, tarsus 2. 



Young. Browner than the adults ; the feathers edged with p;iler 

 brown, the chest streaked and mottled with brown centres to the 

 feathers. 



Hah. From Mexico southwards throughout S. America to Peru 

 and the Argentine Republic. 



ica. 



Sir W. Burnett and Admiral 



Fitzroy [P.]. 

 H. Whitelv, Esq. [P.]. 

 H. Whitely, Esq. [C.]. 



A. R. WaUace, Esq. [C." . 

 A. R. WaUace, Esq. [CJ. 

 John Taylor, Esq. [P.]. 



20. Falco alhigularis. 



Falco aurantius, ^, y, Lath. Ind. Orn. i. p. 48 (1791). 



Falco albigularis, Baud. Trm'te, ii. p. 131 (1800, ex Lath. var. ^). 



Falco rufigularis, Datid. Traite, ii. p. l-3l (ISOO, ex Lath. var. y) ; 



Graij, Cat. Accipitr. 1848, p. 54; Strtcld. Om. Sijn. p. 88 flSoo), 

 Falco aurantius, Licht. Verz. Doithl. p. 61 (1823) ; Bunn. Th. Bras. 



ii. p. 98 (1856) ; Schl. Mus. P.-B. Falcones, p. 24 (1862) ; Elliot, 



B. K. Am. ii. pi. xxxii. (1869) ; Schl. Revue Accipitr. p. 40 



(1873). 

 Falco thoracicus, Donuv. Kat. Rep. pi. 45 (1823). 

 Bidens aurantius, <S);;'.c, Av. Bras. p. 17 (1824). 

 Falco cucullatus, Sio- An. in Menaij. p. 340 (1837). 

 Ilj-potriorcbis rutigularis, Gray, Gen. B. i. p. 20 (1844); id. Hand-l. 



B. i. p. 21 (1869); Pelz. Orn. Bras. pp. 5, 397 (1871); Scl. 8,- Salv. 



Komencl. p. 121 (1873). 

 Hypotriorchis aurantiacus, Kaup. Mus. Send;, iii. p. 2o7 (1845). 

 Falco hsemorrhoidalis, Halui u. Kust. Viig. Lief. xv. pi. 1 (1850). 

 Hypotriorchis aurantius, Bp. Comp. i. p. 25 (1850). 

 VOL. I. 2 E 



