362 
APPENDIX.—F. 
Tar behind Legs ratber short. Tibia feathered the whole way 
Tarsi much flattened, anteriorly broadly scutellate. Hind toe 
small, with a free web. Centre toe nearly double the length of 
the tarsus ; outer toe equal to centre. Inner toe shorter, with¬ 
out a margin ; webs granulated, like morocco leather. Claws 
small, stout, arched. 
Plumage dense, blended, very soft, and on the lower glossy as 
satin, with a velvety feel to the touch. Primaries not tapering, 
but at the extremities sharply rounded. Tail short, stiff, oval, with 
the two centre feathers longest, and rather pointed. 
Bill bluish-black ; iris brown; legs and feet dusky-crimson; 
webs dusky; claws black. Top of the head, nape, back, scapu¬ 
lars, wing coverts, and primaries sooty-black ; secondaries snow- 
white, forming a conspicuous broad band across the wing, when 
flying; rump, upper tail coverts, and tail, dingy black, without 
the slightest metallic gloss or colored reflection. The forehead, 
encroaching on the upper mandible, dull brownish-black ; chin, 
cheeks, throat, and upper breast, dark, cinereous gray, with a soft 
satin-like lustre. Sides deeper colored, with a brownish tinge ; 
belly and vent lighter than the breast, and more silvery ; under 
tail coverts, and under side of tail dark dingy gray; under 
wing coverts, and under side of primaries, dark cinereous gray. 
Anterior to the eye, and occupying the whole insertion of the 
upper mandible from the frons downward, a dingy white patch ; 
posterior, and slightly inferior to the eye, a larger and brighter 
white spot, of an elongated and acute oval form, running toward 
the nape. 
Females similar in general color ; but the upper parts of a 
more dingy and rusty black; the under parts lighter and more 
silvery gray; the legs and feet dusky orange instead of dusky 
crimson, and somewhat inferior in size. Smaller males, supposed 
young, similar to the females. 
Length to end of tail, 181 inches; to end of claws, 20 T y 
Length of bill along the gap, 2\ inches; from the extremity of 
the frons to the tip, li inches. Length of wing, 10 T y inches. 
Extent, 24i inches. Length of tarsus, l T e 7 inches. Of centre toe. 
2 t 9 o ; outer toe the same ; inner toe, 2£. Weight, 21 lbs. 
