_Early Stages._--These have been partially described and figured by Edwards. This species has thus far been found only in Colorado at an elevation of from ten to twelve thousand feet above sea-level. There are two or three other species of this obscure genus, but they are rare boreal insects, of which little is as yet known. Genus GEIROCHEILUS, Butler _Butterfly._--Medium-sized butterflies, dark in color, with light eye-like spots on the primaries and brown borders on the secondaries. The antennæ are short, with a gradually tapering club; the palpi are long, slender, compressed, well clothed with scales on the lower surface. The costa of the fore wings is strongly arched, the outer margin evenly rounded, the outer margin of the hind wings regularly scalloped. The costal vein of the primaries is somewhat thickly swollen at the base. _Early Stages._--Unknown. [Illustration FIG. 119.--Neuration of the genus _Geirocheilus_.] (1) =Geirocheilus tritonia=, Edwards, Plate XVIII, Fig. 21, ♂ (Tritonia). _Butterfly._--The wings of the upper side are dark brown, with a submarginal row of white-centered ocelli below the apex of the primaries. The secondaries are marked with a submarginal band of red. On the under side the fore wings are as on the upper side. The hind wings have the submarginal band purplish-red, irrorated with whitish and dark-brown scales, on the inner edge relieved by a number of imperfectly developed ocelli, which are partially ringed about on the side of the base by pale yellow. _Early Stages._--Unknown. _Tritonia_ occurs in southern Arizona and northern Mexico. Genus NEOMINOIS, Scudder _Butterfly._--Medium-sized, with the costa and inner margin of the fore wing straight, the outer margin of the same wing evenly rounded. The hind wings have the outer margin evenly rounded, and the costal margin quite strongly produced, or bent at an angle, just above the origin of the costal vein. The inner margin is straight. The costal vein of the fore wing is slightly swollen. The costal margin at the extremity of the second costal nervule is slightly bent inward; the upper discocellular vein is wanting; the lower radial vein is emitted from the lower discocellular a little below the point at which it unites with the middle discocellular. The middle discocellular of the hind wing appears as an inward continuation of the lower radial for some distance, when it bends upward suddenly to the origin of the upper radial. The head is small; the antennæ are short, with a thin, gradually developed club; the palpi are slender, compressed, well clothed with long hairs below. [Illustration FIG. 120.--Neuration of the genus _Neominois_, enlarged.]