2084 The Zoologist— A piul, 1870. 



antibracliium. Entire upper parts glossy black, will) a bluish lustre, 

 coiilinuous with a broad collar of the same around the sides and front 

 of the neck. Under parts from the neck pure while, the elongated 

 feathers oi' the flanks and sides blackish. Under surface of wings 

 pearly ash-giay ; inner webs of primaries and secondaries dull gray- 

 brown, the shafts brown, blackish at tip and whitish towards the 

 base. 



Length IS'SO, extent -2400, wing G'SO, tail about 2*25 ; tarsus 100 ; 

 middle toe 140, its claw, "40; outer toe 1*40, its claw 30 ; inner loe 

 100, its claw -40; bdl— chord of culmen 200, its curve 2-10; depth 

 of bill at base 140; rictus r2o; gonys r45 ; greatest width of bill 

 (which is at base of nostrils) "60; length of nasal slit 'So. 



Young: Bill much smaller and weaker than in the adult; without 

 the basal ridge, and with only slight indications of the warty callosities 

 at angle of rictus ; the terminal grooves wanting, or faintly indicated ; 

 the culmen much less convex; the gonys convex and ascending 

 posteriorly, without the sharp hamular process at base. Such are the 

 general cliaraclcristics of the young, though full-grown bird. Birds 

 not grown have their bill much smaller still, entirely without grooves 

 or ridges, acute at the apex, the culmen and gonys perfectly straight; 

 the lateral aspect of the bill is almost an equilateral triangle. Bill 

 basally blackish ; terminally yellowish. Legs and feet reddish yellow, 

 obscured witli dusky. The eyelids want the lleshy processes. In 

 colours of plumage the young birds are almost exactly like the parents, 

 except that the ashy of the sides of the head is tinted with sooty black, 

 more or less directly continuous with the black of the crown, and 

 lightening into a dusky ash on the auriculars and lower parts of the 

 sides of the head. 



Nestlings are covered with blackish down, becoming whitish on the 

 under parts from the breast backwards. 



This species presents little variation in any respect from the condi- 

 tions as above described. The dimensions do not vary much, and 

 even the bill is very constant in size, .shape and colours. The 

 ])lumage of the adults scarcely presents appreciable variation. 



The ])rotuberance on the lower eyelid is horizontal, and occupies 

 the whole lenglii of the lid. That on the upper eyelid is nearly 

 perpendicular, and higher than broad ; but is short, acute, and never 

 developed into an acute process. 



Thtre is absolutely no difference between American and European 

 specimens. 



