The diagnosis of the subfamily will be found on page 178. The
_Seiureæ_, as there stated, have the wings pointed, and rather longer
than the nearly even tail, which is unspotted. The genera differ in
proportion rather than absolutely, _Oporornis_ having longer wings and
larger claws. The coloration, however, is always distinctive, as
follows:—
Under part white or whitish, thickly streaked … _Seiurus._
Beneath yellow, without spots … _Oporornis._