88 the worm-eating swamp-warbler.' 
fever, but requires to be used with judgment, as too large a dose proves 
deleterious. 
The roof of the mouth is flat and slightly arched, posteriorly with two 
ridges, anteriorly with a middle prominent and two very slight lateral ridges; 
its width 82 twelfths. The tongue is 5 twelfths long, emarginate and papil- 
late at the base, narrow, tapering, thin, concave above, the tip rather abrupt;, 
and terminated by several stiffish bristles, like that of a Titmouse. The 
oesophagus is 1 inch 9 twelfths long, its greatest width 3 twelfths. The 
stomach is small, elliptical, 51 twelfths long, 44 twelfths in breadth ; the 
lateral muscles moderate, the lower very thin ; the epithelium longitudinally 
rugous. The stomach is filled with insects. The intestine is 5J inches long, 
from 14 twelfths to 1 twelfth in width. The cceca are 14 twelfths long, and 
4 twelfth wide ; their distance from the extremity 7 twelfths. 
The trachea is 1 inch 7 twelfths long, flattened, 1 twelfth broad at the 
upper part ; the rings about 70, moderately firm ; bronchial half rings about 
15 ; the muscles as usual. 
Worm-eating Warbler, Sylvia vermivora , Wils. Amer. Orn., vol. iii. p. 74. 
Sylvia vermivora, Bonap. Syn., p. 86. 
Worm-eating Warbler, Sylvia vermivora , Aud. Orn. Biog., vol. i. p. 177 ; vol. v. 
p. 460. 
Bill longisli, nearly straight, rather strong, elongated-conical, as deep as 
broad at the base, with sharp, nearly straight edges. Nostrils basal, oval, 
half concealed by the feathers. Head rather large, neck short. Body short 
andfull. Feetof ordinary length, rather slender ; tarsus compressed, covered 
anteriorly withafewlongishscutella, acute behind, longer than the middle toe; 
toes scutellate above, free ; claws arched, slender, compressed, acute. 
Plumage blended, soft and tufty. Wings of ordinary length, considerably 
curved, the second quill longest, the first little shorter. Tail rather short, a 
little rounded, of twelve rather narrow, obtuse feathers. 
Bill blackish-brown above, greenish-grey beneath. Iris hazel. Feet flesh- 
colour. General colour of the upper parts deep green, tinged with brown. 
Head and lower parts light brownish-yellow, the former with four longitu- 
dinal black bands, of which one on each side proceeds from the middle of 
the upper mandible, the other from the inferior angle of its base. The lower 
part of the neck anteriorly, and the fore part of the breast are more yellow 
than the rest of the under parts ; the abdomen and under tail-coverts nearly 
white. • . 
Length 54 inches, extent of wings 84 ; bill along the ridge T \, along the 
gap I ; tarsus f, middle toe I. 
The female hardly differs from the male in external appearance. 
