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 RED- 

 NAPED WOODPECKER {Sphyrapicus v. nuchalis). 



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



and an adult male specimen of the Bed-naped woodpecker 

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



