24. 
228 
p. 379 (1915). [Masatierra I., Juan Fer- 
nandez Is., type in Am. Mus. N.H.] 
Juan Fernandez Kestrel. 
Slightly larger; wing g 190 mm.; more 
deeply coloured and more heavily marked ; 
vent and under tail-coverts clear buff; 
spots below larger and more numerous ; 
2 under parts (except throat) much deeper, 
in some specimens dull rufous, obscurely 
streaked and spotted with blackish ; vent 
and thighs clear buff. 
Cerchneis isabellinus tsabellinus (Swains.), 
Anim. in Menag., p. 281 (1838). [Demarara, 
type in Brit. Mus.] 
Isabelline Kestrel. 
Smaller and paler; $ wing 178, tail 127 
mm. ; head and nape bluish slate, without 
rufous when fully ad.; above rufous, 
with only one or two small specks of 
black ; wing-coverts slate blue, slightly 
spotted with black ; primaries with black 
bars more or less obsolete, not extending 
across webs; tail with black subterminal 
band 15-25 mm. wide, and white tips ; 
outer web of outer feather white, inner 
rufous; below light pinkish cinnamon, 
unspotted (except in less mature birds) ; 
thighs and vent white ; 2 below isabelline, 
with a few fine streaks and spots of pale 
brown on chest and sides of breast ; nape 
often with rufous patch or tinge. [Specific 
distinctions : small size, slate crown, and 
unspotted cinnamon under parts. ] 
Guiana and 
E. Venezuela 
(E.to Caracas(?), 
S: ito 
Rio Branco, 
N. Brazil). 
