228 



p. 379 (1915). [Masatierra I., Juan Fer- 

 nandez Is., type in Am. Mus. N.H.] 

 Juan Fernandez Kestrel. 



Slightly larger ; wing ^ 190 mm. ; more 

 deeply coloured and more heavily marked ; 

 vent and under tail-coverts clear buff ; 

 spots below larger and more numerous ; 

 $ under parts (except throat) much deeper, 

 in some specimens dull rufous, obscurely 

 streaked and spotted with blackish ; vent 

 and thighs clear buff. 



324. Cerchneis isabellinus isabelUnus (Swains.), 

 Anim. in Menag., p. 281 (1838). iDemarara, 

 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, sMghtly 

 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 Ught pinkish cinnamon, 

 unspotted (except in less mature birds) ; 

 thighs and vent white ; ? 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. to 



Rio Branco, 

 N. Brazil). 



