VIREONINyE. VIREO. 
159 
Loggerhead Shrike, Lanius Carolinensis, Wiis. Amer. Orn. v. iii. p. 57. 
Lanius ludovicianus, Bonap. Syn. p. 72. 
Lanius Excubitorides, American Grey Shrike, Swains. & Rich. F. Bor. Amer. v.ii. 
p. 115. 
Loggerhead Shrike, Nutt. Man. v. i. p. 261. 
Loggerhead Shrike, Lanius Ludovicianus, Aud. Orn. Biog. v. i. p. 300 5 v. v. p. 300. 
FAMILY XX. VIREONIN^. GREENLETS. 
Bill of moderate length, straight, rather stout, compressed 
toward the end ; gape-line slightly arched, notches distinct, 
tip very small, declinate. Head rather large, ovate ; neck 
short ; body rather slender. Feet of moderate length ; 
tarsus compressed, slender, with seven anterior scutella ; 
toes rather small, hind toe rather stout, lateral equal. Claws 
moderate, arched, compressed, acute. Plumage soft and 
blended. Wings of moderate length, rather pointed. Tail 
of moderate length, even or emarginate. Roof of upper 
mandible concave, with a median ridge ; tongue narrow, 
flat above, with the point slit ; oesophagus of moderate 
length, without dilatation ; stomach, roundish, muscular, 
with a dense rugous epithelium ; intestine short, and rather 
wide ; coeca very small. Trachea simple, with four pairs of 
inferior laryngeal muscles. 
GENUS L VIREO, Vieill. GREENLET. 
Bill rather short or of moderate length, rather strong, 
straight, broader than high at the base, compressed toward 
the end ; upper mandible with the dorsal line slightly con- 
vex, the ridge narrow, the sides sloping and towards the 
end somewhat convex, the edges straight, the notches dis- 
tinct, the tip small, decurved, acute ; lower mandible with 
the angle of moderate length and rather narrow, the dorsal 
line ascending and rather convex, the sides convex, the 
edges inclinate, the tip acute and ascending. Nostrils basal, 
oblong. Head rather large, ovate ; neck short ; body rather 
