1924] Swarth: Birds and Mammals of the SkeerM River Region 341 



as follows : Prince William Sound, Alaska, 2 specimens (including the 

 type of Bryohates puhescens glacialis) ; lower Taku River. Alaska, 2 ; 

 Skeena River region (Hazelton and Kispiox Valley), British Colum- 

 bia, 13 ; "Warner Mountains, California, 4 ; Sierra Ancha, Arizona, 2. 

 In my opinion, the downy woodpeckers from these several points 

 should all be included under one name. As shown in the accompany- 

 ing table, the southern birds are slightly larger than the northern 

 ones, which is curious, considering north and south variation in general 

 in the genus Dryolates. The southern birds are also somewhat blacker, 

 that is, with less white spotting upon wings and coverts. Individual 

 variation is such, however, that it is impossible satisfactorily, to 

 diagnose two subspecies in the material examined. 



For the application of the name Bryohates pubescens leucurus 

 (Hartlaub) to the downy woodpecker of the Rocky Mountain region, 

 see Grinnell, 1923, p. 30. 



TABLE 1 

 Measurements in Millimeters op Dryoiates pubescens leucurus 



Mus. 

 No. 



Sex 



Locality 



Date 



Culmen 



1287 



9732 



9733 



42117 



42115 



14137 



14138 



27710 



1288* 



42105 



42108 



42111 



42116 



14139 



14140 



27711 



cfim. 

 cT 



& 



9 

 9 

 9 

 9im. 



9 

 9 

 9 

 9 



Prince William Sound, Alaska, Sept. 7, 1908 



Taku River, Alaska, Sept. 4, 1909 



Taku River, Alaska, Sept. 13, 1909 



Kispiox Valley, B C, July 13, 1921 



Kispiox Valley, B. C, Sept. 5, 1921 



Warner Mts., Calif., June 29, 1910 



Warner Mts., Calif., June 30, 1910 



Sierra Ancha, Arizona, June 23, 1917 

 Prince William Sound, Alaska, Sept. 18, 1908 



Hazelton, B. C, ' June 16, 1921 



Kispiox Valley, B. C, June 29, 1921 



Kispiox Valley, B. C, July 9, 1921 



Kispiox Valley, B. C, Sept. 8, 1921 



Warner Mts., Calif., June 30, 1910 



Warner Mts., CaUf., July 6, 1910 



Sierra Ancha, Ariz., June 25, 1917 



15.6 



16.8 



16.2 



16.6 



16 



18.6 



18 



18 



15 



16 



16 



16.5 



15.5 



17.6 



17 



17 



* Type of Dryohates pubescens glacialis Grinnell. 

 t Rectrices shortened by wear. 



Picoides arcticus (Swainson). Arctic Three-toed "Woodpecker 



Not common. We had been in the region three weeks before seeing 

 a three-toed woodpecker of either kind. Picoides arcticus and P. a. 

 fasciatus were then both discovered, each in small numbers, and under 

 precisely the same conditions. They were in the loAvlands, but inhabit- 



