598 Mr. E. Gibsou on the Ornithology of [Ibis, 



in the winter-time. On 12 August of the last-mentioned 

 year I saw a flock of five in the outskirts of Tapalque, a 

 small town in the Azul district, and I only mention the fact 

 (nnconnected with Ajo) as being the only instance of a flock 

 observed, versus our single visitors. Mr. Grant got one 

 specimen in January 1908, but personally I do not recollect 

 having seen any more in Ajo since 1898. 



The bird is an anachronism, and, apart from its rarity, 

 its j)eouliarities have always had a fascination for me. 

 *' What is this huge and lonely Thrush ? '' I would ask myself 

 on each occasion, as it unexpectedly came under my notice 

 in the open campo. And the next moment, as it took to 

 flight, " Thrush ! No, a Plover^ and of the most striking and 

 swiftest kind ! " Finally, on going home and turning up 

 my references and diary, it cost me a mental effort to 

 reconcile the identification with a member of the Tyrant 

 family. 



112. Tsenioptera nengeta (Linn.). Pepoaza Tyrant. 

 The only record of this Tyrant is that by Mr. Grant — one 

 solitary male — on 29 October, 1908. 



114. Tsenioptera dominicana (Vieill.). Dominican Tyrant. 



As stated by Mr. Grant, this striking species is only to 

 be found in the " rincones," the wild lonely land of coarse 

 grasses and saltwater creeks, or on the outskirts of the same. 

 On the plains proper I have never seen it — for example, on 

 the remainder of the Yngleses estancia. Nor is it likely to 

 be overlooked, with its most conspicuous plumage of snowy- 

 white and jet-black, perched on the highest plant possible. 

 In its proper haunts — the " rincones ^^ — I have observed it 

 all the year round, though more frequently in the winter 

 months — generally individual birds, and occasionally a pair 

 (these latter only occurred in the winter, which goes to 

 confirm Gram's opinion that it does not nest with usj. 

 Two pairs have been the most seen in one day. It is 

 exceedingly wild and difficult to get within gunshot of, 

 and I never have been near enough to distinguish its note. 



