_Satyrus alope_, the Wood-nymph butterfly, is a medium-sized grayish brown species, with a broad yellow band across the fore wing. This yellow area contains two eye-spots, dark with blue centers, and in the male there is a smaller eye-spot in the hind wing also. There is a good deal of regional variation in this species: specimens from the Northwest are often small and dark, with a reddish tinge on the lower side of the wings; while in those from northern New England and eastern Canada the yellow band is very dim, and the eye-spots are only vaguely indicated. The eggs are barrel-shaped, and are laid upon various kinds of grasses; the caterpillar has two slender diverging anal horns; the chrysalis is green, with a prominent tubercle on the thorax. The Wood-nymph is not a strong flyer, but flits about in a furtive, moth-like fashion; if pursued it will often close the wings and fall like a leaf into the grass. These butterflies are usually single brooded, and pass the winter in the larval state. THE LIBYTHEINAE The butterflies of this subfamily are easily recognized by the very long projecting palpi, which have the appearance of a beak or snout. _Libythea bachmanni_, the common Snout-butterfly, is a small, reddish brown species, with three or four white spots near the tip of the fore wing. The eggs are found upon Hackberry leaves; the caterpillar has a small head and two or three enlarged thoracic segments; the chrysalis has a sharply pointed head and a conical abdomen. This species probably spends the winter in the chrysalis condition. THE GOSSAMER-WINGED BUTTERFLIES The Lycaenidae is the family of delicate little butterflies known as “blues,” “coppers,” and “hair-streaks.” Metallic blue, red, and grey are the predominating colors, and the “hair-streaks” usually have an orange spot on the hind wings. The males of this family do not use the first pair of legs in walking, but the females walk with all six feet. The caterpillars are small and usually slug-shaped, and the chrysalids are held closely to some supporting object by a girdle of silk. THE LYCAENINAE _Lycaena pseudargiolus_ is the common little blue butterfly found in every part of the United States except the far West. It is extremely subject to seasonal and geographic variations, seven or eight distinct varieties having been described. The wings of some specimens are almost black, others are a very pale blue, while still others combine the blue ground-color with a broad black border. The eggs are laid upon a great variety of plants; the caterpillars are very small and slug-shaped, and usually feed upon flowers instead of leaves. The caterpillar produces a sweet liquid which attracts ants, and it is said that these ants protect the caterpillar from minute parasitic flies which would otherwise destroy it.