G R O U S. 317 



ed, flies away with a loud noife, like a coarfe laugh. The Keren, 

 or common Ptarmigan, on the contrary, is filent, and inhabits the 

 Alps only. 



Rock Grous, ArU. Zool. ii. N" 1 84. 17. b. 



ROCK GROUS. 

 A T HudfotCs Bay a White Grous, feemingly of a different fpecies Description. 



from the common, is obferved. In fize it is lefs by one 

 third. It is exadlly like the other in colour, excepting that it has 

 a black line from the bill to the eye. 



The manners differ fomewhat, as it inhabits rocky places or_;a- 

 niper plains, at all feafons. It frequently ftretches the neck out, 

 and makes a croaking kind of noife. They are very numerous at 

 the two extremes of the Bay, but never vifit the middle fettle- 

 ment, except in very fevere weather. This is called by the na- 

 tives Ufcathachijh, by the Englijh, Rock-Partridge; whereas the 

 other is diftinguilhed by the name of Wapatheu. 



Tetrao canus, Sparr, Muf. Carlf. N° 16. j_ ^^ 



helsi'ngian 

 T ENGTH fifteen inches. Bill black : the whole plumage of GROUS. 



a hoary white, obfcurely undulated with brown, the ends of DEscRIPTIo^f. 



the feathers being of that colour : wing coverts brownifh, marked 



•with a whitifh fpot at the ends : vent white : the tail clouded 



above with hoary, white, and brown : legs black. 



A fpecimen of the above bird was fent to the author from the Place. 



province of Helfingia, in Sweden ; and is faid to be pretty frequent " 



in a particular fpot. From the colour of the tail, it cannot be a 

 variety of the Ptarmigan in any ftage ; nor does the author think 



SuppL. F f it 



