NEW SPECIES OF GROUSE. 
831 
the Rocky Mountains. Its summer dress is interme- 
diate in colour between that of T . lagopus and 
rupestris ; hut it differs from both these species in its 
smaller size, and in its tail being totally white at all 
seasons. The sexes of my specimens were not noted ; 
but none of them have the black eye stripe ; and Mr 
Drummond, who killed great numbers, is confident that 
that mark does not exist in either sex.” — Richardson. 
Account of several new species of Grouse , recently 
discovered by Mr David Douglas , among the Rocky 
Mountains. 
The interesting species of grouse, which we have 
now the pleasure of noticing, were discovered by Mr 
David Douglas, the intelligent traveller employed by 
the London Horticultural Society to explore some of 
the northern regions of America. They are described 
and figured in Mr James Wilson’s elegant Illustrations 
of Zoology , and specimens of the whole are deposited in 
the Edinburgh College Museum. 
The following details, communicated by Mr James 
Wilson, will enable those of our readers who may not 
have an opportunity of consulting his splendid Illustra* 
tionSy to form a distinct conception of these beautiful 
and interesting birds. 
“ The most remarkable of the species, to which we 
have now to direct the attention of our readers, is 
the Tetrao urophasianus , or pheasant-tailed grouse, 
the largest of all the American species of the genus, 
and, excepting the capercailzie, or wood grouse, the 
largest to be met with in any country. This bird 
was observed by Messrs Lewis and Clark, by whom 
it is mentioned under the name of the ‘ cock of the 
plains.’ A short notice of it was also published some 
time ago, in the Zoological Journal , by Charles Lucian 
Bonaparte, who obtained an imperfect specimen of the 
male in London. 
“ The length of this bird, when full grown, is thirty- 
