328 



NORTH AMERICAN BIRDS. 



culmen, 2.20. It differs somewhat in plumage also, the lower parts being nearly uni- 

 formly light isabella-color, not variegated by the black spots ; the whole wing (except the 

 quills) is pale isabella-browii, the wing-coverts with terminal triangular spots of black ; 

 the back is also light-colored, Uke the wings. 



Haliai Uis leucocephalus. 



Hah. Entire continent of North America, north of Mexico. 

 Localities quoted: Upper Texas; breeds (Dresser, Ibis, 1865, 65). 

 (CouES, P. A. N. S., 1866, 49). 



Western Arizona 



