This is a large genus of mostly tropical species, possessed of rather singular habits. The caterpillars in the early stages of their existence have much the same habits as the caterpillars of the genus _Basilarchia_, which have been already described. After passing the third moult they construct for themselves nests by weaving the edges of a leaf together, and thus conceal themselves from sight, emerging in the dusk to feed upon the food-plant. They live upon the _Euphorbiaceæ_, the _Lauraceæ_, and the _Piperaceæ_. The insects are double-brooded in the cooler regions of the North, and are probably many-brooded in the tropics. [Illustration FIG. 111.--Neuration of the genus _Pyrrhanæa_.] (1) =Pyrrhanæa andria=, Scudder, Plate XXIV, Fig. 1, ♀ (The Goatweed Butterfly). _Butterfly_, ♂.--Solidly bright red above, the outer margins narrowly dusky on the borders. On the under side the wings are gray, dusted with brown scales, causing them to resemble the surface of a dried leaf. ♀.--The female has the upper side paler and marked by pale fulvous bands, as shown in the plate. Expanse, ♂, 2.50 inches; ♀, 3.00 inches. _Early Stages._--In Fig. 21, on p. 9, is a good representation of the mature caterpillar, the nest which it constructs for itself, and the chrysalis. A full account of the life-history may be found in the "Fifth Missouri Report" from the pen of the late C.V. Riley. The caterpillar feeds on _Croton capitatum_. The insect ranges from Illinois and Nebraska to Texas. (2) =Pyrrhanæa morrisoni=, Edwards, Plate XXIV, Fig. 2, ♀ (Morrison's Goatweed Butterfly). _Butterfly_, ♂.--Much like _P. andria_, but more brilliantly and lustrously red on the upper side, and marked with paler macular bands like the female. ♀.--Differing from the female of _P. andria_ in the more macular, or spotted, arrangement of the light bands on the wings, as is well shown in the plate. Expanse, 2.25-2.50 inches. _Early Stages._--Unknown. This species occurs in Arizona and Mexico. (3) =Pyrrhanæa portia=, Fabricius, Plate XXIV, Fig. 3, ♂ (Portia). _Butterfly._--Splendid purplish-red on the upper side. On the under side the fore wings are laved with bright yellow on the basal and inner marginal tracts, and the secondaries are dark brown, irrorated with blackish scales arranged in spots and striæ. Expanse, 2.75-3.00 inches. _Early Stages._--Unknown. _Portia_ occurs in the extreme southern part of Florida and in the Antilles. Genus AGERONIA, Hübner (The Calicoes) [Illustration FIG. 112.--Neuration of the genus _Ageronia_.]