Mr. R. B. Sharpe's Catalogue of Accipitres. 561 



cimen from Demerara, and the male of which was long ago 

 figured by Buffon in the PL Enl. pi. 144, under the title of 

 " Emerillon de Cayenne/" This species inhabits all the most 

 northern counties of South America, and, according to 

 Mr. Eidgway, is found on the Atlantic coast of North 

 America as far northward as Florida and in one instance 

 has occurred in Georgia. I have seen both sexes from 

 Ecuador, the United States of Colombia, and Venezuela, 

 also three males from British Guiana, and a female, probably 

 referable to this species, from Trinidad"^. 



In T. isabellinus the crown of the head is a dark slate- 

 colour, in many cases unmixed with rufous ; but in some in- 

 dividuals, especially those from north-eastern South America, 

 an admixture of rufous on the crown is apparent. When the 

 male first attains its adult plumage, the amoimt of spotting 

 above and below is nearly as much as in the very old males 

 of T. sparverius ; but in the oldest and most typical males of 

 T. isabellinus all spots have disappeared from the under 

 surface, and also from the interscapulars and scapulars, ex- 

 cept a very few, which remain near the lower extremity of 

 the latter. The males have the breast richly tinged with rufous, 

 varying in intensity in different individuals, and in some 

 instances extending, but with a fainter hue, to the abdomen, 

 crissum, and thighs ; in those specimens in which the rufous 

 tint is confined to the breast, the abdomen, under tail-coverts, 

 and tibial feathers are white. The females bear a general 

 resemblance to those o£ T. sparverius; but the rufous and 

 black bars on the upper surfaces are in most cases more 

 distinct and more strongly coloured than in the majority of 

 the females of T. sparverius. Referring more particularly 

 to the specimens which I have examined, three males from 

 British Guiana in the British Museum have all of them some 

 rufous on the crown of the head ; in two it is very slight, 

 but in the third it is considerable f: the last-named specimen 



* Tliis species is probably rare in Trinidad, as no Kestrel is men- 

 tioned in Leotard's work on the birds of tliat island. 



t The Cayenne male figured by Buffon, to which I have already re- 

 ferred, is represented with a rufous crown. 



