. Eastern forest insects . Winter is spent in the adult stage, and the adults appear in early spring. Eggs are deposited in clusters around small twigs. The larvae feed gregariously until almost full grown and usually defoliate one branch before moving to another. Chrysalids are formed in June or early July. Adults soon appear and lay the eggs for a second brood. Larvae of this generation are present until September. Then they pupate and the adults emerge to hi- bernate. There are one or two generations per year, depending on location. The mourning-cloak butterfly is of minor importance in the
. Eastern forest insects . Winter is spent in the adult stage, and the adults appear in early spring. Eggs are deposited in clusters around small twigs. The larvae feed gregariously until almost full grown and usually defoliate one branch before moving to another. Chrysalids are formed in June or early July. Adults soon appear and lay the eggs for a second brood. Larvae of this generation are present until September. Then they pupate and the adults emerge to hi- bernate. There are one or two generations per year, depending on location. The mourning-cloak butterfly is of minor importance in the forest, but is sometimes injurious to shade and ornamental trees. Infestations can be controlled by cutting and burning infested twigs and small branches. The viceroy, Limenitis (=Basilarchia) archippus (Cramer), occurs over most of the United States and feeds on poplar, willow, and plum. The adult resembles the well-known monarch butterfly, Danaus plexippus (L.), but differs by being slightly smaller, hav- ing a narrow black line across the hindwings and only a single row of black spots in the black marginal band of the wings. The full-grown caterpillar is about 37 mm. long. The head is large, pale green, and bilobed. Body segments one and two are pinkish to brownish; segments three to six and the sides of seven are brownish or greenish; the tops of segments seven and nine and nearly all of eight are pale-pinkish or whitish; and the top of nine and nearly all of the last three are brownish or greenish. There 293
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Keywords: ., bookcentury1900, bookcollectionbiodive, booksubjectforestinsects
