OF THE UNITED STATES 



285 



Let us next investigate this matter in the way I have already 

 proposed above, and for this purpose I choose an adult male 

 specimen of Harris's woodpecker (Dryobates villosus harrisii) 



Fig. 70. Ventral View of a Plucked Specimen of the Eed- 

 naped Woodpecker {Sphyrapicus v. nuchalis). 



Showing its pterylosis or feather-tracts. Life size, hy the Author, from nature. 



and an adult male specimen of the Red-naped woodpecker 

 (Sphyrapicus varius nuchalis). These birds are now before me; 



