PASSERES TYRANNIDAE TYEANNUS VOCIFERANS. 



343 



incessant warfare, which is carried on with apparently no other object than 

 amusement. Their nests are bulky affairs ; resembling those of the King- 

 bird. One found at Provo was placed on the end of a cottonwood limb over- 

 hanging the river, and composed of cottonwood down and grasses, lined 

 with a few hairs. The eggs are indisguishable from those of the common 

 By the latter part of July, the young are generally able to fly. 



Kingbird. 



TYRANNUS VOCIFERANS, Swains. 



Cassin's Flycatcher. 



Tyrannvs vociferans, SWAINS., MOD. Tyrant Shrikes in Quar. Jour. Sci., xx, Jan., 1826, 

 273. BD., Birds N. A., 1858, 174. Id., U. S. & Mex. Bound. Surv., ii, pt. 

 ii, 1859, Birds, 8. HENRY, Proc. Acad. Nat. Sci. Phila., 1859, 100 (New 

 Mexico). COUES, Proc. Acad. Nat. Sci. Phila., 1866, 59 (Fort Whipple, 

 Ariz.). COOPER, Birds Cal., i. 1870, 314. COUES, Key N. A. Birds, 1872, 

 170, f. 110 d . AIKEN, Proc. Bost. Soc. Nat. Hist., 1872, 205 (El Paso County, 

 Col.). MERRIAM, U. S. Geol. Surv. Terr., 1872, 690 (Cheyenne, Wyo). 

 HENSHAW, Rep. Oru. Specs., 1873, Wheeler's Exped., 1874, 125. BD., 

 BREW., & RIDG., Birds N. A., ii, 1874, 327, pi. 43, f. 5. COUES, Birds 

 Northwest, 1874, 238. 



Tyrannus cassinii, LAWK., An. Lye. Nat. Hist. N. Y., v, 1852, 39, pi. 3, f. 2 (Texas). 



The range of this species seems to be in general complementary to that 

 of the preceding bird, occupying its place to the southward, in New Mexico 



