Tyrant Shrikes of America. 275 



Such is the description of a bird brought by Mr. Bullock from 

 the shores of Mexico. It is probably the T. griseus of M. Vieillot, 

 whose account, so far as it goes, is not inapplicable. 



Total length 8 J, bill 1$, wings 4$, tail 4, depth of the fork $. 



Sp. 10. Ttrannus crudelts. Sp. Nov. 

 Gray-headed Tyrant. 



T. olivaceus, flavus infra; capite cerviceque cinereis; crista 1 aurantiaca ; 

 mento juguloque cinereo-albis; remigibus primoribus acuminatis; caudfi 

 furcata. 



Olive, beneath yellow; head and neck cinereous; crest orange; chin and 

 throat cinereous-white ; primary quills pointed; tail forked. 



Size of T. crinitus, but the wings are longer, and the bill much 

 larger. The upper part of the head and neck clear cinereous, which 

 colour, although of a much paler hue, tinges the throat, leaving the 

 chin almost white ; the ear-feathers are dusky black, and on the crown is 

 a concealed crest of bright orange-coloured feathers : the remaining parts 

 of the upper plumage are dull olive, and of the under pure yellow. 

 Wings blackish-brown ; all the primaries are abruptly pointed ; the covers 

 and lesser quills have whitish margins. Tail blackish, rather lengthened, 

 and forked to the depth of more than half an inch. Bill and tarsi black, 

 the latter very short. 



Inhabits open cultivated tracts in northern Brazil ; feeding both upon 

 insects and reptiles. 



Total length 8f, bill, extreme length, 1^, wings 4j%, tail 3j, tarsi •§. 



I feel some hesitation in pronouncing this to be an undescribed 

 bird ; for, as it is by no means uncommon in the northern pro- 

 vinces of Brazil, it appears somewhat strange that, if it be new, 

 it should so long have escaped the observation of naturalists. 

 Nevertheless, it cannot be referred to any of those species, either 

 of the genus Lanius or Muscicapa, described in the General 

 Synopsis of the venerable Latham. It approaches nearest to the 

 Tyrant Fly- catcher of that author, but is near two inches longer, 

 while the hind part of the neck, instead of being " deep brown," 

 is cinereous. 



The birds, thus far enumerated, are among the largest and most 

 powerful of the Tyranni. Those which follow are rather smaller, 

 but are placed at the extremity of this section, on account of the 

 length and emargination of the quill-feathers. 



