13 
Wing ¢g 400, 2 418 mm.; above black, 
mantle only with creamy buff wavy bars ; 
upper tail coverts white; tail buff with 
13 or 14 black bars and a broad terminal 
band. 
2la. Polyborus cheriway pallidus Nelson, Pr. Tres Marias 
Biol. Soc., Wash., xii., p. 8 (1898). [Zves Is., W. Mexico. 
Maras Is.] 
Tres Marias Caracara. 
Paler insular race. 
$22. Polyborus lutosus Ridgw., Bull. U.S. Geol. Guadeloupe 
Surv. Terr., i., p. 459 (1875). [Guadaloupe.] I., W. Mexico 
Guadeloupe Caracara. (now extinct). 
Wing ¢ 380-400, 2 393-416 mm. ; general 
plumage marked with transverse bars of 
brownish black and brownish white ; crown, 
wing-coverts, terminal portion of primaries 
and terminal band on tail blackish brown. 
Gen. XV. IBYCTER Vieill. (1816) 
Type Falco americanus Bodd. 
Head generally with recurved crest. 
Nostrils round. Size variable (16-25 in.). 
23. Ibycter ater (Vieill.), Analyse, p. 22 (1816). Amazon 
[Brazil.] District of 
Yellow-throated Caracara. S. America. 
Wing ad. 322 mm.; plumage black with 
greenish reflections ; a white band across 
base of tail. 
