Above olive-green; beneath yellow without streaks … Oporornis.
4. Wings rounded, shorter than the graduated tail.
Geothlypeæ.
Above olive-green; beneath yellow, without streaks … Geothlypis.
ICTERIANÆ.
5. Bill very deep and compressed; tail graduated; outer toe deeply cleft.
Icterieæ.
Olive-green above; bright yellow anteriorly beneath. Upper mandible deeper than the lower … Icteria.
Plumbeous-blue above; red, black, and white beneath. Upper mandible not so deep as the lower … Granatellus.
6. Bill slender, sub-conical, but curved; tail nearly even; outer toe adherent for basal half.