Vol. XVII 
1900 
BisHop, New Birds from Alaska. 119 
Evura in juvenal plumage differs from Audsonicus in the same 
manner as do fall adults but to a greater degree, having the crown 
and nape far darker and more drab, the throat much clearer 
black, far less rusty on the back and breast, and the wings and 
tail slate-black, with little of the brownish of Audsonicus from New 
York and Quebec. vura in first winter plumage — represented 
by a specimen taken at St. Michaels September 20, 1899, — has 
a somewhat paler head than an August adult in fall plumage; but 
a darker head, blacker throat and less rusty back than young 
hudsonicus — Ungava to New Brunswick — in similar plumage. 
Hylocichla ustulatus almze Overholser. AtMa’s THRUSH. 
This subspecies, separated by Mr. Oberholser (Auk, Vol. XV, 
p. 304), with a type taken in the East Humboldt Mts., Nevada, 
June 24, proves to be the common Thrush of the Yukon Basin 
and distinctly separable from swainsoniz. Yukon birds are grayer 
above and average paler below and grayer on the sides than the 
type of alma, and differ greatly in these respects from swarnsonzz, 
but the type of a/me@ is nearer the Yukon bird than to szaznsonzt, 
and is grayer than one taken at Lake Marsh, July 5. Our Yukon 
specimens are more worn than the type of a/me, though taken at 
about the same date. 
An adult in winter plumage taken at Circle City, August 20, 
has the dark markings of throat and breast blacker than in 
swainsonit, the buff of cheeks paler and the upper parts, includ- 
ing wings and tail, darker and more olive. 
In juvenal plumage a/me differs from szaimsoni from New 
Hampshire far more than do the adults. In a/me the upper 
parts, wings and tail are between olive and olive-green — almost 
the same shade as a/icie in first winter plumage — becoming raw 
umber on outer edges of quills and wing-coverts, and the central 
markings of the feathers of crown and scapulars are pale cream- 
color; far different from the raw umber upper parts with tawny 
olive edgings of quills and coverts, and bright buff central streaks 
of feathers on head and back of swainsoni?. The orbital ring and 
suffusion of auriculars are cream-color in a/me, only the loral 
stripe approaching the buff of sqwazmsonii; the chest and throat 
are cream-color instead of buff, the dark markings blacker, the 
