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U. S p. R E EXP. AND SPRVEYS ZOOLOGY GENERAL REPORT. 



List of specimens. 



TYRANNUS VOCIFERANS, Swain son. . 



Cassiii's Flycatcher. 



Tyrannus t'oci/erans, Swainson, Mon. Tyrant Shrikea'in Quarterly Journal Sc. XX, Jan. 1826, 273 — Ib. Philos. 



Mag. I, 1827, 368. 

 Tyrannus cassinii, Lawrence, Ann N. Y. Lyceum, N. H. V, 1852, 39 ; pi. iii, fig. 2, (Texas.) 



Sp. Ch. — Bill from the forehead about as long as the head. Tail even or slightly rounded. Outer five primaries attenuated ; 

 the first four abruptly (ind deeply emarginated ; third quill longest, second and fourth a little less, first shorter tlian the sixth, 

 and half an inch less than the longest. Head and neck above and on the sides rather dark bluish ash ; the throat and breast 

 similar, and only a little paler. Rest of upper parts olive green tinged with gray, mixed with brown on the rump ; the upper 

 tail coverts and surface of the tail nearly black ; the outer web of the external feather and the tips of all pale brown. The chin 

 is white, in strong contrast to the dark ash of the throat ; the rest of the under parts bright sulphur yellow, (the sides olivaceous ;) 

 palest on the under tail coverts and inside of wing. A concealed vermilion patch in the crown, bordered by straw yellow. 

 Wing feathers orown, tinged with olive, becoming paler towards the edge. Length, 8.80 inches ; wing, 5.25 ; tail, 4.25. 



Hoi. — Valley of Gila, eastward to Pecos river, Texas, and into Mexico, on table lands. 



