Tyrant Shrikes of America. 273 



Sp. 6. Tyr annus crassirostris. Sp. Nov. 

 Thick-billed Tyrant. 



T. griseo-fuscus, infra pallida flavus; mento juguloque albis ; remige primo 



subacuminato; rostro valido. 

 Gray brown, beneath pale yellow ; chin and throat white, first primary quill 



obsoletely pointed; bill strong. 



This species, recently sent from Mexico, is rendered doubly 

 interesting by the union it presents of the characters which prin- 

 cipally distinguish the first and second sections of this group. 

 The size and strength of the bill would associate it with the first, 

 while the comparative length of the wings, the first quill- feather 

 of which is obsoletely pointed, places it within the limits of the 

 second. 



T. crassirostris is equal in size to a thrush. The upper plumage is light 

 grayish-brown, somewhat darker on the head, the tail, and the greater 

 quill-feathers ; the crown has a concealed yellow crest, and the ear- 

 feathers are dull black ; the chin and throat are white, but the rest of the 

 under plumage is pale yellow: tail even; the upper covers tinged with 

 rufous. 



Inhabits the warm districts of Mexico, and frequents, like others of its 

 tribe, the upper branches of trees, from which it drives away all other 

 birds. 



Total length 9 J, bill 1|, wings above 5, tail 4, tarsi |. 



Sp. 7. Tyrannus vociferans. Sp. Nov. 



Noisy Tyrant. 



T. olivaceo-griseus, infra flavus; crista* rubra; capite juguloque cinereis; 

 mento albo ; cauda 4 nigra, eequali ; remigibus primoribus acuminatis. 



Olive-grey, beneath yellow; crest red ; head and throat cinereous; chin white; 

 tail black, even ; primary quills pointed. 



Size rather less than the last ; the bill is small in proportion to the 

 size of the bird, but is larger than that of T. intrepidus. The plu- 

 mage above is grayish, tinged with olive : but the head, neck, and throat, 

 as far as the breast, are pure slate-colour: the crown has a concealed 

 crest of beautiful orange ; the under plumage from the breast is pale 

 yellow. The wings are very long, and all the primary quills arc abruptly 

 pointed : the tail and its covers are deep black. 



Total length 8§, bill scarcely 1, wings 5, tail 3|. 



From the notes of Mr. W. Bullock, it appears that this species 

 is very common in the neighbourhood of Temascaltepec, a small 



