Family 58. VIREOS. Vireonidæ.
Bill small, but distinctly hooked; outer primary usually very small and sometimes apparently wanting; olive-green gleaners among the leaves.
Family 60. WARBLERS. Mniotiltidæ.
Bill, in most of the species, slender, sharply pointed, and without a notch or hook at the tip; in the genera Wilsonia and Setophaga, flat and flycatcher-like; in Icteria stout; back of tarsus compressed into a thin ridge; three outer primaries of nearly equal length.
