560 



Mr. J. H. Gurney's Notes on 



T. antillarum which I have seen in which the rufous patch 

 on the crown of the head is wanting ; the underparts re- 

 semhle those of the old male of T. sjmrveinus, except in the 

 much greater width of the black marks on the flanks. 



The female from St. Lucia resembles in markings and 

 coloration those from St. Croix and Montserrat^ except that 

 the rufous on the head, though very apparent, is not quite so 

 much developed, and that the dark markings on the flanks 

 are more extended, being almost as wide as in the male. 



The following are the measurements which I have taken 

 from specimens of T. antillarum : — 



Males. 



St. Croix (N. M.) 



St. Croix (CM.) 



Guadeloupe (coll. S. & G.) 

 Dominica (coll. S. & G.) . . 

 St, Lucia (coll. S. & G.) . . 



St. Thomas (coll. S. & G.) 



St. Croix (N. M.) 7-00 



St. Croix (C. M.) 



Montserrat (coll. S. & G.) 



St. Lucia (coU. S. & G.) . . . . 6-40 



It will be observed in the above Table that the wing- 

 measurements of the pair of Kestrels from St. Lucia are 

 decidedly smaller than those of specimens of the like sexes 

 from the other islands ; the comparatively large size of the 

 females from St. Thomas and Montserrat is also remarkable. 



I may add, for comparison, the following wing-measure- 

 ments quoted by Mr. Lawrence from Mr. Obers's notes, viz. 

 '^ Guadeloupe, male 6*50, female 7-25 ; Dominica, male 6-75/' 



I now propose to consider the Kestrel to which Swainson 

 assigned the specific name of isabellinus, founded on a spe- 



