This genus was created by Oates for the little Wren Troglodytes formosus (punctatus), which diners from the typical birds of the genus Troglodytes in having a much stouter bill and a more graduated tail. The plumage in Elachura is spotted and not barred.
In Elachura the sexes are alike and the young are probably similar to the adult. The bill is stout and almost half the length of the head. The wing is very short and rounded and the first primary is about two-thirds the length of the second. The tail is well graduated, the outer feathers reaching to about the middle of the central ones. The tarsi, toes and claws are long and strong. There are only two species known and one of these, Elachura haplonota, is represented by a single specimen.
Key to Species.
A.Upper plumage spotted Elachura formosa,. p. 449.
B.Upper plumage unspotted Elachura haplonota, p. 450.
* The name punctata cannot be used for this little Wren as Troglodytes punctatus is already preoccupied by Brehm. Troglodytes formosus of Walden is therefore the next available.