G98 GEOLOGICAL SUEVEY OF THll TERRITORIES. 



(Sub-fiimily Milvincv, the Kites.) 

 Circles hudsonitis, Vieillot, (marsh-hawk :) 



Hah. — All of ISTorth America and Cuba. 



Marsh-hawks were quite abimdaiit in the Salt Lake Basin, thence 

 northward to Henry's Lake, and down Snake River. 



(Sub-family Aquilincc, the Eafjlcs.) 



Fcmdion carolinensis, Bon., (fish-hawk :) 



Hah. — Thronghout temperate l^orth America. 



Fish-hawks were only met with on the North Fork of Snake River; 

 here I shot one specimen as it was soaring around its nest. 



Family 49. — Tetraonid^, the Grouse. 

 Tetrao ohscums, var. ricliardsonii^ Douglas, (Richardson's grouse :) 



Hal). — Central Rocky Mountains and northward. 



This bird is easily distinguished from the T. ohscurus by the tail, which 

 in the latter is broadly tipped with light slate, while in T. richardsomi 

 the terminal band is much narrower and more indistinct, or wanting en- 

 tirely. The species was not abundant, being met with chiefly in the 

 T6tou Mountains. I obtained one of their eggs in Teton Canon ; it 

 was light colored, sparingly spotted with brown. 



