14 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 124 



(chord of unfiattened wing), tail (from insertion of two central tail 

 feathers), cuhnen (exposed portion), tarsus, and middle toe (without 

 claw). Comparisons of means of wing, culmen and tarsus measure- 

 ments are given in tables 2 to 7 and their ranges, means, and two 

 standard errors are shown in figures 1 to 3. Gradation of races by wing, 

 tail, bill, and tarsus length and by shade and hue of color is shown in 

 table 8. Breeding, migration, and winter distribution is based almost 

 entirely on determination of specimens examined in the present study. 



1. Alaska hermit thrush: Catharus guttatus guttatus (Pallas). — 

 Medium shade. Olive Brown. Small: cf (12 specimens), wing 86-90.5 

 (88.5), tail 61-68.5 (65), culmen 11.5-13.5 (12.3), tarsus 27-30 (28.7), 

 midtoe 16-17.5 (16.5); 9 (11 specimens) wing 83-85.5 (84.2), tail 

 59.5-65.6 (63.2), culmen 11.5-12.5 (12.2), tarsus 27-29 (28.3), mid- 

 toe 15.5-16.5 (16.2). 



Paler and less rufescent than nanus; more rufescent, shorter winged 

 and longer legged than oromelus; paler than vaccinius; smaller winged 

 and darker than euborius. 



Breeds on the southern Alaskan and northern British Columbian 

 coasts, excluding the outer islands of southeastern Alaska and the 

 Queen Charlotte Islands. 



Winters on Pacific Coast and in interior from Washington (Port 

 Angeles) south to Baja California (Casa Pintada and Ensenada) and 

 Jalisco (October record at Jonila), east to Idaho (Moscow), Texas 

 (San Antonio, Langtry, Brewster County, Fort Clark, mouth of Pecos 

 River), occasionally to North Carolina (Asheville), Georgia (De Kalb 

 County) , and northeastern Mexico (Monterrey and Rodrigues, Nuevo 

 Leon). 



Exceptions to the general color trend in coastal Alaska were noted 

 in one June and two July specimens from Yakutat that were darker 

 and more grayish above than the general mode. They were quite 

 similar in color to breeding specimens from the Cascade Mountains, 

 being only slightly darker. A specimen taken May 11 on Chichagof 

 Island, Hoonah Sound, and one taken May 2 on Lemesurier Island, 

 Icy Strait, Alaska, look like the dark gray Yakutat Bay population 

 and possibly are migrants. Breeding specimens from Chichagof Island 

 look like other medium olive-brown breeding buds from coastal 

 Alaska. 



There is general agreement in the literature, including Ridgway 

 (1907), Hellmayr (1934), and the American Ornithologists' Union 

 (1957) , that the name guttatus, originally applied to the buds of Kodiak 

 Island, Alaska, is applicable to the population of Alaska in general 

 and southward in a rather indefinite pattern into British Columbia, 

 or even as far as northwestern United States (Miller et al., 1957; 

 Phillips, 1962), excluding the coastal islands of southeastern Alaska 



