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



563 



partially approach in the coloration of portions of their plu- 

 mage T. sparveroides of Cuba (which, as subsequently to be 

 noticed, has also been obtained in Florida) , in having " a 

 greater or less mixture of plumbeous feathers in various 

 parts of the dorsal region, particularly in the rump and upper 

 tail-coverts/^ 



I may add that the iris in T. isahellinus is brown (vide 

 'Ibis/ 1880, p. 177), where this species is enumerated under 

 the specific name of sparverius. 



The following are notes of measurements which I have 

 taken from specimens of T. isabellinus : — 



Males. 



Wing. Tarsus. 



Middle 



toe s. u. 



m. 

 Three from Britisli Guiana j 



Plain of Valencia, Venezuela, i 

 (coll.S.&G.) \^'^^ 



Merida, Venezuela (coll. S. 

 & G.) 



Five from Colombia (N. M. 

 &coll. S.&G.) 



Five from Ecuador (N. M. and 

 coU. S. & G.) 



Trinidad (N. M.) 



Seven from Colombia and 



Ecuador (N, M, and coll. 



S.&G.) 



Depth of 

 subter- 

 minal bai- 

 Culmen. ou tail, 

 in. in. 



1-30 0-90 0-40 0-95 



Referring now to T. leucophrys of Ridgway, I may observe 

 that Mr. Sharpe gives the habitat of that species as Cuba 

 only ; but it is also a native of St. Domingo, and is, I believe, 

 the true "Falco dominicensis" of Gmelin, which was founded 

 on the "Emerillon de St. Domingue '' of Brisson, The latter 

 author describes very well the old male of this species, and 

 he also describes and figures a younger male under the idea 



