PALCONID^. CYMINDIN®. 
209 
Ibyctbr, Vieillot. Bill feeble^ small, very slightly 
hooked ; the cutting margin sinuated, but not fes- 
tooned: under mandible nearly 
straight. Orbits, sides of the 
head, and part of the throat, 
more or less naked. Wings 
rather lengthened ; the third 
quiU longest. T ail lengthened, 
rounded ; the feathers very 
hroad. Tarsi slender, mo- 
derate, naked : lateral toes un- 
equal ; the hinder toe much shorter than the inner toe. 
America only. (/iff. 186.) 
I. leucogaslor. Vied. Gal. 6. (a) ater. ^1;) Vied. Gal. 5. 
PoLYBORUS, Vieil. Form aqui- 
line : size moderate. Bill with 
the base rather straight. Nos- 
trils oval, obliquely transverse. 
Orbits and face partially naked. Tarsi rather length- 
ened, naked, very slender. Toes slender ; the middle 
much lengthened, the outer rather shorter than the 
inner, and the hinder toe much the shortest. Claws 
but slightly curved. Tail moderate, broad. (Jiff. 187.) 
P. IJraziliensis. Zool. III. ii. pi. 1 . 
Cymindis, Cuvier. Bill high, the sides much com. 
pressed, with the hook considerably lengthened ; the 
cutting margin irregularly sinuated, or nearly straight; 
under mandible small and weak. Sides of the head 
and orbits partially naked. Nostrils obliquely trans- 
verse, opening by a slit. Tarsi very short, not exceed- 
ing the hind toe and claw ; the anterior part plumed 
half way from the knee. Toes broad, with fleshy 
margins ; the two lateral exactly equal ; tlie middle 
slightly longer, the hinder slightly shorter, than the 
inner toe. The claws nearly equal, except the exterior, 
which is smallest. Soles of the feet very broad, and 
without prominent pads. Wings long; the fourth 
quill the longest. 
C. cuculo'ides. PI. Col. 103, 104. 
p 
VOL. II. 
