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 hav^e 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 Osbiu-n, 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, 

 running 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. CheckEst 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 ; RockweU 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 



