Mr. R. B. Sharpens Catalogue of Accipitres. 557 



and Grenada (all of which are probably referable to T. antil- 

 larum), and the points in which that subspecies differs from 

 the typical T. sparverius. 



In the adult males of T. sparverius all the rectrices, except 

 the outer pair and frequently also the next pair, are usually of 

 an unbroken rufous above the dark subterminal band ; but it 

 occasionally happens, even in males that are fully adult, that 

 the outer edge of these rcctrices is marked at intervals with 

 black spots, the position of which answers with more or less 

 regularity to the transverse bars which cross the tails of the 

 females and youngest males of this species. In T. antillarum 

 the spots appear to be constantly present, and sometimes to 

 be developed into transverse bars reaching across the tail, 

 though whether these bars ever remain in their unbroken 

 state when the bird becomes old I am unable to say ; but I 

 incline to the opinion that they indicate partial immaturity, 

 and that they probably break up into spots as the age of the 

 bird advances. The males of T. antillarum are further distin- 

 guished from those of T. sparverius by the larger size and 

 greater profusion of the dark spots on the flanks and on the 

 grey wing-coverts, the latter being also sometimes slightly 

 spotted with rufous. In addition to these peculiarities of the 

 males of T. antillarum, the females are distinguished by the 

 markings on the under surface being of a much darker 

 brown than is the case in the females of T. sparverius. 



I have seen no specimens of T. antillarum from Porto Rico 

 and St. Bartholomew, and no males from St. Thomas ; but 

 descriptions of all these from the pen of Mr. Ridgway will 

 be found in the ' Land-birds of North America,' vol. iii. p. 167 

 (footnote). I have, however, examined two examples from 

 St. Thomas in female plumage — one in the British Museum, 

 and the other in the collection of Messrs. Salvin and God- 

 man ; both these only differ from the females of T. sparverius 

 in the brighter hue of the rufous portions of the upper sur- 

 face and of the tail, and in the darker tints of the markings 

 on the under surface to which I have already alluded. A 

 female from Montserrat, in the possession of Messrs. Salvin 

 and Godman, only differs from their St.-Thomas female in 



