Rocky-Mountain Hermit Thrush 521 
Alaska Hermit or Kadiak Dwarf Thrush. 
Hylocichla guttata. 
A.0.U. Checklist no 759—Colorado Records—Sprague 96, p. 85 
(Turdus aonalaschke) ; H. G. Smith 96, p. 76 ; Cooke 97, pp. 125, 170, 
223 ; Henderson 03, p. 237; Warren 06, p. 24. 
Description. —Adult—Above plain greyish-brown, becoming cinnamon- 
brown on the upper tail-coverts and tail; a white orbital ring ; sides 
of the face and ear-coverts greyish-brown, not buffy ; below white, 
chest very slightly tinged with buffy, with conspicuous triangular 
spots of dusky ; flanks slightly washed with pale greyish-brown ; iris 
brown, bill black, pale horn at the base of the lower mandible, legs 
light horn. Length 6-0; wing 3-50; tail 2-60; culmen -5 ; tarsus 1-05. 
The female is slightly smaller—wing 3-25. Young birds are streaked 
and spotted with buffy above, the chest is more strongly tinged with 
buffy, and the lower-breast and flanks more or less barred with dusky. 
Distribution.— Breeding in the coast districts of Alaska, and migrating 
south in winter to Lower California, Chihuahua and western Texas. 
One of the migration routes of this Hermit-Thrush runs along the 
foothills and neighbouring plains of eastern Colorado, where the bird 
is quite common in the spring and autumn. It was first recognized as a 
Colorado bird by Sprague, who obtained an example at Magnolia, in 
Boulder co., 7,500 feet, October 6th, 1895. Other records are: 
Baca co., May Ist to 12th (Warren), El Paso and Lincoln cos., April 
24th to May 24th (Aiken coll.), Denver, May 13th, September 26th 
and October 5th (H. G. Smith), Fort Collins, October Ist (Cooke). 
Frey found large numbers of these birds along the river bottom at 
Salida on May 3rd, 1908, and for ten days or so afterwards. They 
appeared after a very heavy storm. 
Rocky-Mountain Hermit-Thrush. 
Hylocichla guttata auduboni. 
A.O.U. Checklist no 759a—Colorado Records—Allen 72, pp. 147, 
155, 161, 173 (7. pallast) ; Trippe 74, p. 228; Henshaw 75, p. 144; 
Scott 79, p. 91; Minot 80, p. 224; Tresz 81, p. 283 ; Drew 81, p. 86; 
85, p. 15; Allen & Brewster 83, p. 152; Stone 84, p. 20; Beckham 
87, p. 124 ; Morrison 88, p. 70; Thorne 88, p. 265 ; Kellogg 90, p. 89; 
Lowe 92, p. 101; 94, p. 270; McGregor 97, p. 39; Cooke 97, pp. 19, 
125, 223; Keyser 02, pp. 68, 235; Henderson 03, p. 237 ; 07, p. 31; 
09, p. 242 ; Gilman 07, p. 195 ; Rockwell 08, p. 179. 
Description.—Hardly to be distinguished from H. guttata, except 
by its larger size ; upper-parts a trifle greyer and cinnamon of tail a 
shade duller. Length 6-50; wing 3-87; tail 2-90; culmen -52; tarsus 1-12. 
