Elm-leaf Beetle

Galeruca xanthomelæna. The adult is oblong, 4 in. long, yellowish, with a black line on each wing cover. In May, when leaves have developed on the elm, this insect leaves its hibernating place and feeds on the leaves. In a few days the yellow, bottle-shaped eggs are laid in a double row under the side of the leaf. Throughout June the different 484 batches of eggs hatch into small, blackish larvæ, that develop some yellow on the back as they grow. They eat the cells from the under side, while the adult eats clean through; hence the leaves dry up, turn brown, and soon fall. The larvæ descends the tree-trunk after 20 days. At the base of the tree they Elm-leaf Beetle. a, eggs; b, larvæ; c, adult; e, eggs, enlarged; f, sculpture of eggs; g, larvæ, enlarged; h, side view of enlarged segment of larvæ; i, dorsal view of same; j, pupa, enlarged, k , beetle, enlarged; 1, portion of elytron, enlarged. change into soft, yellowish pupæ, that become adult in 8 or 10 days. In dry weather the adults feed a month, then prepare for hibernation. If tree makes new shoots, a new brood may be produced. Spray at first appearance, and repeat often, with water 150 gals., Paris green 1 lb., lime 1 lb., glucose 3 qts.