Black-throated Grey Warbler 457 
flanks less distinct. Young birds of both sexes are tinged with brown 
‘on the back, and also on the flanks, and have the black streaks very 
indistinct. 
Distribution.—Grace’s Warbler, originally discovered by Coues in 
Arizona and named by him after his sister, breeds throughout northern. 
Mexico and the mountains of New Mexico, Arizona and south-west 
Colorado, and winters in western Mexico (Jalisco). 
In Colorado it was first met with by Drew in San Juan co., and 
‘subsequently by Morrison in La Plata co. ; the latter observer describes 
it as an uncommon bird, but found it breeding at an elevation of 8,500 
feet. Cary states that it is tolerably common in the Yellow Pine 
forests near Pagosa Springs. He obtained a specimen May 28th. 
The only other record from the State is that of Osburn, who observed 
a small flock on migration near Loveland in the extreme north, 
and obtained a single specimen on April 25th, 1889. 
Habits.—Drew describes Grace’s Warbler as a “ dainty 
little inhabitant of the pines up to 7,500 feet,’ and in 
the White Mountains of Arizona, where it is one of the 
commonest summer Warblers, it was noted by Hen- 
shaw as frequenting the tops of the coniferous trees, 
tunning swiftly over the smaller branches at the 
extremity of the limbs, and pursuing its prey on the 
wing. It was occasionally, too, seen among the oaks. 
Morrison found a nest in May, 1887, about four feet 
from the ground, in a juniper bush; it was placed in a 
forked limb and was lined with dried grass, cowhair, 
and a few feathers; it contained four eggs, white with 
reddish spots very sparingly distributed near and on the 
larger end. A second nest was found a few days 
later. The eggs measure about ‘69 x ‘50. 
Black-throated Grey Warbler. Dendroica nigrescens. 
A.O.U. Checklist no 665—Colorado Records—Aiken 72, p. 197; 
‘Trippe 74, p. 232 ; Henshaw 75, p. 198 ; Morrison 88, p. 72 ; Cooke 97, 
pp. 19, 116, 168; 04, p. 87; Chapman 07, p. 151 ; Rockwell 08, p. 176; 
Warren 09, p. 17; Cary 09, p. 183. 
Description.—Male in spring—Crown and head all round black, 
except for a white band from above the eye to the nape, and another 
from the base of the bill along the sides of the throat ; a small yellow 
spot in front of the eye ; back grey with a few black streaks ; wings 
