of the District of Montreal. 42? 



black, broadly margined and tipped with white ; flank feathers 

 white, margined with jet black on the upper vanes. 



2nd primary longest; 1st next; length 22 inches ; alar expan- 

 se 29 inches; length of bill from the frontal feathers, 1 inch 4 

 lines. The female resembles that of the A. albeola. The white 

 patch in the cheek does not make its appearance until the second 

 year. The trachea of this species presents a singular conforma- 

 tion in the male. 



A, kisirionica. Harlequin duck. 



Fuligula histrionica. Bonaparte ! 



Clangula histrionica of Leach, Richardson, and Swainson ! 



Histrionicus torquatus. Baird ! 



v.s.p. Bill bluish black, orange red at the tip; legs and feet 

 blackish brown ; irides hazel ; eggs 12 to 14, white. 



Dorsal aspect. Space between the eye and bill, a spot on the 

 auriculars, a streak on each side the nuchal region, collar at the 

 base of the neck, a transverse stripe on the shoulders, the outer 

 vanes of the scapulars, white ; a stripe from the base of the bill 

 to the occiput bluish black, bounded on the sides by a stripe of 

 chestnut, commencing over the eye, and meeting on the occiput; 

 the remainder of the head and neck dark plumbeous blue ; com- 

 mencement of back and shoulders dull blue ; interscapulary resfion, 

 rump, and wing coverts, blackish brown ; tail coverts blackish 

 green, as well as the speculum ; tail acuminate, hoary blackish 

 brown ; primaries blackish brown ; the white on the shoulders 

 bounded by black. 



Ventral aspect. Chin and throat bluish black ; breast bluish 

 slate colour; belly, vent, and tail coverts, dark blackish brown ; 

 sides and flanks chesnut, faintly barred with black ; sides of the 

 rump bluish black. 



1st primary longest, the others graduated ; length 18 J inches ; 

 alar expanse 26 inches; length of bill from the frontal feathers 

 1 inch 1 line ; length of the middle toe, tarsus and nail, 3j 

 inches. 



Sub-genus Oidemia, 



Sub-gen. Char. Bill broad ; gibbous above the nostrils, with 

 dilated margins ; teeth laraelliform and coarse ; nostrils central, 

 large, oval ; tail short for the size of the bird. 



