HARLEQUIN DUCK 383 



WESTERN HARLEQUIN DUCK 



HISTRIONICUS HISTRIONICUS PACIFICUS (Brooks) 



Hwtrio?iicus histrionicus pacificus Brooks, Bull. Mus. Comp. Zool., vol. 59, p. 393, 1915. 



Characters : Size slightly larger than birds from the eastern coast of America and from Iceland, es- 

 pecially in the bill, which is longer and heavier. Culmen of adult males up to 28 or 29 mm. in length 

 and also wider and deeper in proportion. Wing 200-210 mm.; tarsus 38. The chestnut stripes on 

 each side of the crown are distinctly paler and narrower. In most cases they do not extend so far for- 

 ward as in Atlantic Coast specimens. 



Bange : All Pacific Coast specimens and also all breeding birds from the western United States and 

 western Canada probably belong to this form. A specimen taken by F. Harper in the delta of the 

 Athabasca Biver in 1920 also clearly belongs to this form. Females are not easily identified. 



END OF VOLUME III 



