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GENUS II.— TROGLODYTES, Cuv. WREN. 
Bill of moderate length, or nearly as long as the head, slender, slightly 
arched, much compressed toward the end ; upper mandible with the dorsal 
line slightly convex, the edges a little inflected toward the end, the notches 
slight, the tip rather acute ; lower mandible with the angle rather long 
and narrow, the outline slightly decurved, the sides erect and convex, the 
edges inclinate, the tip acute. Nostrils oblong, operculate, exposed. 
Head oblong ; neck short ; body slender. Feet of ordinary length, rather , 
strong ; tarsus longer than the middle toe, compressed, with eight anterior 
distinct scutella ; toes of moderate size, the third and fourth united at the 
base, the first very large, the lateral nearly equal ; claws rather long, 
moderately arched, much compressed, very acute. Plumage soft and 
blended. Bristles obsolete. Wings of moderate length, or short, convex, 
much rounded ; the first quill very small, the fourth and fifth longest. 
Tail rather short, rounded, of twelve slightly arched, weak, rounded 
feathers. 
ROCK WREN. 
Troglodytes obsoletus, Say. 
PLATE OXYI. — Adult Female. 
This species was discovered by some of Major Long’s exploring party, 
and first described by Mr. Thomas Sat. My friend Thomas Nuttall, 
who had opportunities of studying its habits, during his recent journey 
in company with Mr. Townsend, has assured me that they are very 
similar to those of the other Wrens. The figure in the plate was taken 
from an adult female, given to me by Mr. Nuttall ; and I have since then 
obtained two males. 
“ On the 21st of June,” says Mr. Nuttall, “on the ledges of the bluffs 
Vol. II. 19 
