Genus Orellana Dist.

Key to Species.

Tegmina almost wholly opaque brown, with a small ba ­ sal vitreous area.

Wings with a fuscous spot on bases of second and third apical cells; abdomen length equal to that from apex of head to posterior border of mesonotum, broadest at middle; exterior border of tympanal coverings not extended beyond sides of abdomen................................. pulla, Godg.

Wings unspotted; abdomen length equal to length of mesonotnm, broadest at base; tympanal cover ­ ings extended over sides of abdomen........... ............................... brunneipennis, Godg.

Tegmina mostly hyaline, with some fuscous spots.

Wings clouded with brown on hind border and on transverse veins; tegmina with transverse veins and forks of longitudinal veins broadly brown... ............. nigriplaga, Walk.

Wings immaculate; tegmina with spot on tip of ra ­ dial vein, and at base of second apical cell, fus ­ cous brown.................................... brevis, Dist.