710 



GEOLOGICAL SURVEY OF THE TERRITORIES. 



Order IV.— RAPTORES, THE BIRDS OF PREY. 

 Family 40. — Strigidje, the Owls. 

 Athene liypugma^ Bonap., (prairie-owl :) 



See page — . 



Family 41. — Falconed^. 

 ( Sab-family Biiteoninw, the BuzzardhawTcs.) 

 Buteo swainsonii, Bouap., (Swainsou's hawk:) 



See page 



Order V.— PULLASTR.^. 



Family 43. — Columbid^, the Pigeons and Doves. . 

 Zenaidura carolinensis, Bouap., (common dove :) 



Mourning or ground doves were very numerous in the Salt Lake Val- 

 ley, where I collected twelve of their eggs. They lay two white eggs, 

 either in a slight excavation in the ground lined with a few pieces of 

 straw or dry grass laid loosely together, or in a neat nest of fibrous 

 roots, which is placed on a bush from two to five feet above the ground. 



