384 University of California Publications in Zoology. (Vou. 
on Hinchinbrook Island, this being the next island northeast of 
Montague. These are: No. 1173, collected by L. Kellogg on a 
mountain at about 1200 feet elevation, near Northeast Bay, June 
30; and no. 1172, collected by E. Heller, June 29, at the same 
place. The two remaining specimens were secured on Hawkins 
Island still farther to the northeast, and nearest the mainland. 
These are: Nos. 1170 and 1171, collected by J. Dixon, June 22, 
at about 1700 feet, on a mountain near Canoe Passage. Of 
these five rock ptarmigan, no. 1171 is least typical, and if all 
were as slightly different from rupestris of the interior of Alaska 
as this specimen, I should not deem separation advisable. 
It is to be noted that this least typical example is from 
the island nearest the mainland. The type specimen is from 
the most distant and isolated island, and in it the characters of 
kelloggae are expressed in extremest degree. 
Lagopus rupestris kelloggae is a coarsely barred rock ptar- 
migan, having many of the dorsal feathers with solid black 
central areas. It is therefore distinetly different from Lagopus 
dixoni, and from Lagopus nelsoni and the other forms deseribed 
from the Aleutian chain. The new subspecies is on the other 
hand closest to Lagopus rupestris rupestris, as described in rele- 
vant literature. JI have made comparison with a beautifully 
prepared series of nine skins of the latter, in the collection of 
the United States Biological Suryey, secured in August, 1903, 
by N. Hollister from mountains in the vicinity of Eagle (near 
where the upper Yukon River crosses the eastern boundary of 
Alaska). This series, all from one place, and all males in full 
aestival plumage, is invaluable as serving to show individual 
range in eolor characters. These rock ptarmigan from the in- 
terior of Alaska may of course not be typical of true rupestris, 
the type locality of which I presume to be the vicinity of Hudson 
Bay. But I believe I am safe in inferring from other cases 
among birds, that they are quite close to typical—at any rate 
that the characters of the Hudson Bay rupestris are not of a 
sort to invalidate the recognition of the Prinee William Sound 
kelloggae as a separate subspecies. 
The new ptarmigan is given its name in honor of Miss Louise 
Kellogg, whose unfailing energy as a collector helped materially 
to make the 1908 Alaska Expedition a suecess. 
