ROCK PTARMIGAN. 
99 
lowish-brown ; the tail consisting of fourteen black 
feathers, with the white tips worn off, and of two 
central incumbent feathers, which with the adjoining 
coverts, are barred like the hack ; tarsal feathers very- 
short; toes naked beneath and partially so above. No 
summer specimens of the male were brought home ; 
but that sex differs in having the black eye stripe, 
and in the middle of the belly being white.”* 
Total length of the summer female, 14 inches ; 
tail, 4 ; wing, 7 ; tarsus, 1. 4J ; lines of middle toe, 
1 ; nail of ditto, 1 line. 
The dimensions of the Sutherlandshire specimen 
alluded. to, are as follows, and the woodcut will show 
the proportions of the bill : — The entire length is 
rather more than 12 inches, but would not exceed 
12 J ; of the wing to the extremity of the third 
quill, 71 ; of the tarsus, If, equalling that of the 
centre toe, nail included ; the nail about f . On the 
upper parts the dark or ground colour of the feather 
is deep brownish or pitch-black ; but each feather is 
cut into, or partially bavred, with ochreous-yellow 
on the back and tail-coverts, being tipped and edged 
with a much paler tint, sometimes approaching to 
yellowish-white ; the quills, secondaries, and shoul- 
North. Zool. ii. p. 35(5. 
