168 Jenkins, Variation in the Hairy Woodpecker. [April 



found in California, Lower California, Arizona, and New Mexico. 

 Some of the specimens at hand from New Mexico are intermediate 

 in spotting between the western and eastern forms but are nearer 

 the western. 



Dryobates villosus harrisi has the wing spotting like hyloscopus 

 but the light parts are a deep smoky brown. The extreme of this 

 form is found at Vancouver Island and along the coast region of 

 British Columbia and Washington. There, all birds are uniform 

 smoky and the wings have a uniform scarcity of spots. In northern 

 California and southern Oregon, harrisi and hyloscopus intergrade. 

 In the Siskiyou Mountains are found birds that vary from pure 

 white to very dark. At Sitka, Alaska, harrisi has become very 

 much lighter and some specimens show a great increase in wing 

 spotting. Three specimens from Ducks, B. C. (a region between 

 the Rocky and Cascade Mountains), have characters of both leu- 

 comelas and harrisi. The under parts are pure white while the 

 wings are scarcely spotted. A fourth specimen from the same 

 locality is profusely spotted and hence nearer leucomelas. 



Dryobates villosus monticola, found in the Rocky Mountains 

 from Colorado to Montana, has a scarcity of wing spots like the 

 other western forms but is larger than hyloscopus and the under 

 parts are said to be pure white without any reddish tinge as with 

 some hyloscopus. (In the series at hand there are few specimens 

 of this form, but I believe that when more material has accumu- 

 lated, the range of D. v. monticola will be found to extend no far- 

 ther south than Colorado or farther north than southern Montana 

 and will include Utah, northern Nevada, eastern Oregon, south- 

 eastern Washington and southern Idaho. The evidence for the 

 southern boundary is the fact that D. v. hyloscopus reaches its 

 maximum size in the northern Sierra Nevadas while specimens 

 from Arizona and New Mexico are comparatively quite small. The 

 northern boundary is indicated by intermediates between D. v. leu- 

 comelas and D. v. monticola taken in Montana. And if any form 

 is to be found in the arid interior of Washington and Oregon it 

 would not likely be D. v . harrisi, since that form is not found out- 

 side of the Humid Coast Belt in Alaska.) 



Dryobates villosus jardini is smaller than hyloscopus, the under 

 parts are very dark, and it inhabits the mountainous portions of 

 Central America and Southern Mexico. 



