182 
AVES. 
by feathers; tail very short. Eleven inches long. Inhabits 
Guiana. 
Genus 6.—THAMNOPHILUS_ VieiUot. 
Generic Character. —Bill short, robust, thick, somewhat gib¬ 
bous; base widened, sides dilated, point somewhat compressed, 
obtuse, and considerably bent downwards, with a small notch 
near its tip; nostrils lateral, placed near the base of the bill, 
open, somewhat ovate or rounded; legs long and slender; tarsus 
considerably longer than the middle toe, to which the external 
toe is attached as far as the first joint; wings short, rounded; 
the fourth, fifth, and sixth quills of equal length, and longer 
than the others. 
Thamnophilus niyer .— The Bush Shrike. 
Plate XLI. fig. 1. 
Head furnished with a crest, composed of rather long dense 
black feathers, bristly near the base of the bill, covering the 
nostrils ; the whole plumage is dull grayish-black, slightly tinged 
with blue on the rump and under parts; secondaries barred with 
umber-brown ; toes long and slender, which, with the legs, are 
blackish-brown. Length eight inches. Inhabits South America. 
Genus 7.—VANGA.— Vieillot. 
Generic Character .—Bill long, undulated, hard, sharp at the 
edges, considerably hooked at its point, and sharp ; nostrils 
lateral, placed near the base in the horn of the bill, concealed 
by a cartilage ; tarsus as long, or in others longer than the mid¬ 
dle toe ; the external toe attached to the first joint; third quill 
longest. 
Vanya cristata. — The Crested Shrike. 
Plate XXXVIII. fig. 5. 
Black; collum white, with two lunated white spots behind 
the eyes on each side; large wing-coverts dark brown ; crest 
very long and erect; nuchal bristles hardly perceptible. 
