470 Birds of Colorado 
duller, especially the forehead, which is pale yellow instead of a bright, 
almost orange-yellow. 
Distribution.—Breeding chiefly in Canada from Hudson Bay to 
Newfoundland, and wintering in Central America from Guatemala to 
Costa Rica. 
The discrimination of the eastern and western forms of this Warbler 
in the Colorado records is wu little uncertain, but there can be little 
doubt that the eastern form occasionally occurs as a straggler on 
migration in Colorado. There are no undoubted Colorado examples 
of this form in the Aiken collection, but Ridgway mentions a specimen 
from Fort Garland, taken in May, doubtless by Henshaw, and now 
in the United States National Museum. Most of the other records 
seem to refer to the Pileolated Warblers. 
Canadian Warbler. Wilsonia canadensis. 
A.0.U. Checklist no 686—Colorado Records—Aiken 00, p. 298; 
Cooke 97, p. 220; Chapman 07, p. 280. 
Description.—_Male—Above slaty-grey, the crown slightly spotted 
with black, the forehead, lores and « patch under the eye usually 
black ; a line from the bill to above the eye and the under-parts yellow ; 
a series of black spots across the breast; under tail-coverts nearly 
white; iris brown, bill dusky-brown, paler on the lower mandible; 
legs pale horn. Length 4-75 ; wing 2-45 ; tail 2-15; culmen-4; tarsus -75. 
The female is very similar, but duller throughout, and the black 
of the crown, forehead and lores is less distinct, and the breast spots 
dusky and not well defined. There is very little seasonal change, 
and the young bird is like the female, with still less sign of black. 
Distribution.—Breeding from Athabasca and Newfoundland south 
to Minnesota and Connecticut, and further south along the Alleghany 
Mountains, wintering chiefly in Ecuador and Peru. 
In Colorado the Canadian Warbler is a straggler on migration. It 
has been taken once only-— by Aiken near Limon in Lincoln co., May 
23rd, 1899. The single specimen, a male, is now in the Colorado 
College Museum. 
Genus SETOPHAGA. 
Closely allied to Wilsonia in structure, but the bill rather flatter 
and wider, and the rictal bristles generally more developed ; plumage 
of the males with red or salmon on the wings and tail. 
Two species in the United States. 
American Redstart. Setophaga ruticilla. 
A.O.U. Checklist no 687—Colorado Records—Allen 72, p. 148; 
Aiken 72, p. 197 ; Trippe 74, p. 232 ; Minot 80, p. 228 ; Allen & Browster 
